Question

Assertion (A) : A hormone called abscisic acid inhibits growth in plants.
Reason (R) : The role of auxins is opposite to that of abscisic acid in plants.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

Remember: Auxins promote growth, abscisic acid inhibits it.

Answer 1

The Correct Option is A

Abscisic acid is known as a growth-inhibiting hormone in plants; it promotes dormancy and causes leaves to fall. Auxins are growth promoters and stimulate cell elongation. Hence, the roles of auxins and abscisic acid are indeed opposite. So, the Assertion is true, and the Reason correctly explains the Assertion.