Question

The main sources of biofertilizers are

• A. Rhizobium like bacteria
• B. Cyanobacteria
• C. Fungi
• D. All of the above

Answer 1

The correct option is D All of the above

Biofertilizer is a type of fertilizer containing living microorganisms, that enrich the nutrient quality of the soil. The main sources of biofertilizers are bacteria, fungi, and cyanobacteria (blue-green algae). They form a symbiotic relationship with plants, in which the partners derive benefits from each other.

So, the correct answer is option D.