The correct answer is Tartaric acid.

• Tartaric acid is an organic acid that is white and crystalline.

Key Points

• It is found naturally in many fruits like grapes, bananas, tamarind, etc.
• This acid is added to foods as an antioxidant and to give its distinctive sour taste.
• Crystals and powders are prepared by a chemical process.
• It is also added to food for preservation.
• It is also a good antioxidant and is beneficial for kidneys.
• It helps to absorb minerals in the body.
• It is also helpful in controlling problems related to gases in the body.

The correct answer is Mahi-Kanchan is a high-yielding variety of rice in Rajasthan.

Key Points

• Mahi Kanchan, Mahi Dhawal, and Megha are varieties of maize. Hence statement 3 is incorrect.
• Corn also known as maize, goes by the scientific name Zea mays subsp. mays, and is a part of the grass family of Poaceae.
• The major maize-producing districts in the State of Rajasthan are Bhilwara, Chittorgarh, Udaipur, Banswara, and Bundi.
• The important maize-producing cluster under RACP is Manoharthana, Gudha, Orai Bassi, Kushalgarh, and Jakham.
• The major varieties of maize grown in the State are P3522, P1864, CoH (M)9, etc.

Additional Information

• Suratgarh Mechanised Farm:
  • Suratgarh's Mechanised farm was established in 1956 with the help of Russia. Hence option 4 is correct.
  • Modern methods of cultivation have been here for the production of crops.
  • It has its own canal.
  • Sonara 64 is high – a yielding variety of wheat crops produced here.
  • This farm leads to the promotion of agriculture in Rajasthan.
  • Suratgarh Central State Farm was established in 1956.
• Mechanized agriculture:
  • It is the process of using agricultural machinery to mechanize the work of agriculture, greatly increasing farm worker productivity.
  • Jaitsar Mechanical Agriculture farm:
    • It is situated in Sri Ganganagar. Jaitsar is a town in the Sriganganagar district of Rajasthan, India. Hence option 1 is correct.

Explanation:- 

int main( ) {

int a = 20;

int *b = &a;

printf ( "%d" , *b );          // 20

return 0;

}

We know that pointer variable b stores the address of normal integer variable a. It means the value of pointer variable b ( address of a ). So, in the pointer, we access any value through the * (strick) operator/symbol.

Given the print *b, the compiler shows the output 20 because b store the address of a. * operator access the value of that address so, display the output 20.

Important Points Pointer:- pointer is a variable that stores the address of another variable. it is a dynamic variable pointer variable that has no own memory.

Value at Address ( * ) operator:- The * operator is also known as value at address operator.

The correct answer is Edit Menu.

Key Points 

• Cut, Copy, Paste, Undo options are present on the Edit Menu in the menu bar of Microsoft Word.
• The Edit menu is a graphical control element that handles files, text or images.
• The Edit menu is the second menu in the menu bar, next to the File menu.
• In Microsoft Word, Instead of having to retype or replace text, image or information, Word allows users some communication technique for transferring data through a computer's user interface using the Edit Menu.

Important Points 

• CTRL + V is the shortcut key used to paste the copied or cut portion from a document into another document.
• CTRL + C is the shortcut key used to copy a selected text or image.
• CTRL + X is the shortcut key used to cut a selected text.
• Ctrl + Z is the shortcut key used to undo the last action.

Additional Information 

• The insert menu is a quick way to add features like a break, page number, date and time, text box, etc. to users' documents.
• The help menu gives instructions and information about how to use the program.
• New, Open, Save, Save As options are present on the File menu in the menu bar of Microsoft Word.

All conditions are as follows:

Therefore, Pratik fulfills all the eligibility criteria to appear in the examination.

Hence, the correct answer is "The candidate is eligible to appear in the examination".

The correct answer is ​Red and yellow soil.

Key Points

• Red and Yellow Soil:
  • Red soil develops on crystalline igneous rocks in areas of low rainfall in the eastern and southern part of the Deccan Plateau. Hence option 1 is correct.
  • Along the piedmont zone of the Western Ghat, a long stretch of area is occupied by red loamy soil.
  • Yellow and red soils are also found in parts of Odisha and Chhattisgarh and in the southern parts of the middle Ganga plain.
  • The soil develops a reddish colour due to a wide diffusion of iron in crystalline and metamorphic rocks.
  • It looks yellow when it occurs in a hydrated form.
  • The fine-grained red and yellow soils are normally fertile, whereas coarse-grained soils found in dry upland areas are of poor infertility.
  • They are generally poor in nitrogen, phosphorous and humus.