Question

The major set of elements 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

Explanation for correct option

Option D:

1. Oxygen is an important component of the human body.
2. About $65\%$ of the human body is made up of oxygen
3. Carbon is the most important element in living matter.
4. Important elements like oxygen, carbon, nitrogen, and hydrogen are present in the human body
5. Life requires fewer other elements.
6. Some living tissues also contain traces of iron, cobalt rice rays, silicone, calcium, and magnesium.

Final answer:

The major set of elements in living beings is carbon, hydrogen, and oxygen.