Assertion : Biofertilisers are preferred to chemical fertilisers.
Reason : Chemical fertilisers are generally more expensive and hazardous to environment.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Answer

A

Explanation

Biofertilisers are microorganisms that are used for increasing fertility of soil. For example, free-living bacteria and cyanobacteria that fix nitrogen increase soil productivity. Biofertilisers are preferred over chemical fertilisers because chemical fertiliser are more expensive, disturb soil fauna and flora and affects soil pH. Although chemical fertilisers initiallty show better response than biofertilisers but they decreases soil fertility in the long run.