Match the items in column I with those in column II, and choose the CORRECT answer.
Column I Column II
P. Control of weeds i. Gibberellin
Q. Induction of germination ii. Cytokinin
R. Ripening of fruit iii. $2, 4$ -D
S. Delaying of senescence iv. Ethylene

P-ii, Q-iv, R-iii, S-i

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P-iii, Q-i, R-iv, S-ii

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P-i, Q-ii, R-iv, S-iii

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P-ii, Q-iii, R-i, S-iv

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Solution

The correct option is A P-iii, Q-i, R-iv, S-ii
Ethylene is gaseous hormone that promotes fruit ripening. 2,4-D (2,4-dichloro-phenoxyacetic acid) is selective weed killer which inhibit growth and exhibit toxic effects on plants. Gibberellins are responsible for breaking seed dormancy, mobilization of endosperm reserves and thereby, promote seed germination. Cytokinins (zeatin) are transported from roots to leaves and serve to inhibit the leaf senescence. Thus, the correct answer is option B.

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