Which of the following organisms are known as chief producers in the oceans?

Options

A. Cyanobacteria
B. Diatoms
C. Dinoflagellates
D. Euglenoids

Explanation

Diatoms are chief producers in the oceans and they contribute 40% of marine primary productivity. They constitute a major group of unicellular eukaryotic microalgae and are among the most common types of phytoplanktons. The other given organisms also exhibit autotrophic mode of nutrition.