Q. Which of the following is the pair of biofertilizers?
A) Azolla and BGA
B) Nostoc and legume
C) Rhizobium and grasses
D) Salmonella and E.coli
Explanation
The correct answer is Option A: Azolla and BGA.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.