pyq/2021/prelims/22

Consider the following kinds of organisms:

1. Copepods

2. Cyanobacteria

3. Diatoms

4. Foraminifera

Which of the above are primary producers in the food chains of oceans?

(A) 1 and 2

(B) 2 and 3

(C) 3 and 4

(D) 1 and 4