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

If both assertion and reason are true and reason is the correct explanation of assertion.

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If both assertion and reason are true but reason is not the correct explanation of assertion.

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If assertion is true but reason is false.

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If both assertion and reason are false

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Solution

The correct option is A If both assertion and reason are true and reason is the correct explanation of assertion.
Biofertilizers are organic substances of plant or animal origin that also involve microorganisms like Rhizobium, Anabaena, etc.
These increase the fertility of the soil by replenishing the nutrients and also retain the water content of the soil.
They are preferred over chemical fertilizers, because of the cost involved, being more specific example NPK, does not help retain water and excessive use may result in soil losing its fertility.
So, the correct answer is option A.

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Similar questions

\to τ = \to r \times \to F b u t \to τ \neq \to F \times \to r .

Read the assertion and reason carefully to mark the correct option out of the options given below :

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(d) If the assertion and reason both are false.

(e) If assertion is false but reason is true.

Assertion: Acetic acid does not undergo haloform reaction.

Reason: Acetic acid has no alpha hydrogens.

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