Question

The four elements called "big-four" which make up 95% of all elements found in a living system are

• A. C, H, O, N
• B. C, H, O, P
• C. C,H,O,S
• D. C, N, O, P

Answer 1

The correct option is A C, H, O, N

The cell is composed of all the basic types of elements and on the basis of presence and requirement, the compounds are divided into major and minor types. The biological compounds that are the carbohydrates, proteins and lipids are basically composed of carbon, hydrogen, oxygen and nitrogen and these are present in the body in the maximum amount and so these are also known as the big four.

So, the correct option is 'C, H, O, N'