Civil Services Examination · प्रश्न 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?

1. A1 and 2
2. B2 and 3
3. C3 and 4
4. D1 and 4