Which one of the following is not biofertilizer

Options

A. Mycorrhiza
B. Agrobacterium
C. Rhizobium
D. Nostoc

Answer

B

Explanation

Agrobacterium is a Gram negative bacterium that causes tumours in plants. It is well known for its ability to transfer DNA between itself and plants, and for this reason it has become an important tool for genetic engineering.