Question

The major set of elements present in living beings are

• A. silicon, magnesium, calcium
• B. carbon, magnesium, silicon
• C. hydrogen, iron, cobalt
• D. carbon, hydrogen, oxygen

Answer 1

The correct option is D carbon, hydrogen, oxygen

Carbon, hydrogen and oxygen are the elements that make up the majority of the living body. They constitute the macro and micro-biomolecules of the living body. The most abundant element in living tissue by mass is oxygen.

Silicon, magnesium, calcium, iron and cobalt are present in living tissue in trace amounts but are more abundant in earth’s crust.