The-Living-World Question 689
Question: The four elements that make up 99% of all elements found in a living system are [CBSE PMT 1994]
Options:
A) H, O, C, N
B) C, H, O, S
C) C, H, O, P
D) C, N, O, P
Show Answer
Answer:
Correct Answer: A
BETA
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