Question

Which element is found in protein, DNA, RNA and vitamin? (a) Nitrogen 16. (b) Argon (c) Calcium (d) All of these

Answer 1

Hii friend.................
Option (a) is right
NITROGEN is an essential element in many fundamental cell components such as protein,DNA ,RNA and vitAmin.

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Answer 2

Nitrogen is a very important constituent of cellular components.  Alkaloids, amides, amino acids, proteins, DNA, RNA, enzymes, vitamins, hormones and many other cellular compounds contain nitrogen as one of the elements.
So. Nitrogen is correct