UPSC Prelims 2021Environment & EcologyQuestion 11 of 18Consider 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?A1 and 2B2 and 3C3 and 4D1 and 4See explanation
