A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: B
Solution :
Among the sixteen essential plant nutrients nitrogen, phosphorus and potash are the most common nutrients found deficient in Indian soil. Supply of these nutrients to soil artificially through fertilisers is necessary to keep the soil rich in plant nutrients for achieving maximum yield. Irrigation practices also helpful in enhancing the crop yield. In this way both fertilisers and irrigation are equally important for high crop yield.
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