Which of the following are required in minimum amount by human

Options

A. Iron, iodine, carbon, manganese, copper, `O_(2)`
B. Iron, iodine, manganese, copper, zine, fluorine
C. Iron, iodine, manganese, zinc, hydrogen
D. Nitrogen, oxygen, zinc, fluorine

Answer

b

Explanation

(b) On the basis of their requirement in body the inorganic elements are of two types:
(i) Macroelements : C, H,`N_(2)` and `O_(2)` are called big four elements of living body because they are required in maximum amount in the body.
(ii) Microelements : Iron, iodine, manganese, copper, zinc, fluorine etc, are required in minimum amount in the body.