Which group of organisms are not constituents of a food chain ?
(i) Grass, lion, rabbit, wolf
(ii) Plankton, man, fish, grasshopper
(iii) Wolf, grass, snake, tiger
(iv) Frog, snake, eagle, grass, grasshopper

Options

A. (i) and (iii)
B. (iii) and (iv)
C. (ii) and (iii)
D. (i) and (iv)

Answer

C

Explanation

A food chain is a series of organisms where all the organisms are dependent on next organism as a source of food. The series of organism takes part at various biotic levels to form a food chain. Food chain (ii) It is an aquatic food chain so grasshopper cannot be a part of it.
In food chain (iii) Wolf , snake and tiger , all are carnivoures . There is no herbivore to eat grass therefore grass can not be a part of food chain (iii)