A) carbon, sodium and hydrogen
B) carbon, hydrogen and \[{{O}_{2}}\]
C) nitrogen, carbon and \[{{O}_{2}}\]
D) carbon, phosphorus and oxygen
Correct Answer: B
Solution :
Three most abundant elements in protoplasm are C, H and \[{{O}_{2}}.\] Nitrogen is also present in protoplasm all these 4 making 90% of protoplasm. The largest constituent element of protoplasm is \[{{O}_{2}}\] by weight (63%).
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