Most Abundant Metal in the human body:
ANitrogen
BPhosphorus
CCalcium
DIron
Answer:
A. Nitrogen
Read Explanation:
Among the options provided, the correct answer is Nitrogen.
Nitrogen: ~3% of total body mass (Correct Answer)
Calcium: ~1.5% of total body mass
Phosphorus: ~1% of total body mass
Iron: < 0.01% of total body mass (classified as a trace element)
(Note: While Oxygen is the absolute most abundant element in the body overall at 65%, out of the specific four options given in your list, Nitrogen has the highest percentage).