Read the following statements and identify the correct one based on codes given below:
(1) Guanine present in DNA is a pyrimidine base.
(2) Deoxyribose sugar of DNA is deoxygenated at 2nd and 3rd carbon atoms.
(3) Nitrogenous base of DNA molecule is bound with 1st carbon atom of deoxyribose sugar.
Codes:

Correct option is C

Correct Answer: (c)
Explanation:
Only statement (c) is correct. In DNA, the nitrogenous base is attached to the 1st carbon of deoxyribose sugar forming a nucleoside.
Guanine is a purine, not pyrimidine.
Deoxyribose sugar is deoxygenated only at 2nd carbon, not both 2nd and 3rd.
Information Booster:
Purines → Adenine & Guanine.
Pyrimidines → Cytosine, Thymine, Uracil (in RNA).
Deoxyribose: lacks –OH at 2nd carbon.
Nitrogenous base bonds to sugar via N-glycosidic bond.
Phosphate attaches at 5th carbon of sugar to form nucleotide.
Additional Information (Incorrect Options):
(1) Wrong: Guanine is purine, not pyrimidine.
(2) Wrong: Deoxygenation occurs only at C2’, not C3’.
Thus only (c) is correct.