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M: +2.00/-0.67

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?

[UPSC IAS PRELIMS 2021]
A
B
C
D

EXPLANATION

Self explanatory What are 3 primary producers in the ocean? What are the m...
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