A) 1, 2, 4 and 6 position
B) 1, 3, 5 and 7 position
C) 1, 3, 7 and 9 position
D) 1, 2, 6 and 8 position
Correct Answer: C
Solution :
Purine is an organic nitrogenous base, sparingly soluble in water, that gives rise to a group of biologically important derivatives. Purine possess nitrogen at 1, 3, 7 and 9 position.
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