Assertion : Ethylene is a gas which acts as growth regulator of plants.
Reason: It is the most simple plant hormone.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Ethylene is recognized as a major gaseous plant growth regulator because it inhibits shoot elongation and favors caliper development, and along with auxin inhibits lateral bud development. One of its most pronounced physiological effects is abscission or the shedding of a plant part. Ethylene is a very simple plant hormone. So, both the statements are true but the reason is not the correct explanation for assertion.

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Assertion : Ethylene is a gas which acts as growth regulator of plants. Reason: It is the most simple plant hormone.

Assertion : Ethylene is a gas which acts as growth regulator of plants.
Reason: It is the most simple plant hormone.