engineering recuitment NPCIL Plant Operator Mock Test General Science Chemistry Structure of Atom

एक वयस्क मानव शरीर का तत्विक संयोजन द्रव्यमान के अनुसार किस प्रकार होता है?

1
C > O > H > N
2
O > C > H > N
3
N > C > H > O
4
N > C > O > H
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