Question

Find out the correct combinations from the following:

• A. I & II
• B. III & IV
• C. II, III & IV
• D. I, II, III & IV

Hint:

For plant hormones, remember their physiological roles in pairs (Positive & Negative). Auxin, Cytokinin, ABA, Ethylene, and Gibberellin play specific roles in dominance, dormancy, germination, and senescence. Associating hormones with function helps in MCQs.

Answer 1

The Correct Option is D

I. Auxin promotes apical dominance; cytokinin can inhibit it — correct. II. Seed germination involves Ethylene promoting growth and ABA inhibiting — correct. III. Seed dormancy is maintained by ABA; Ethylene breaks dormancy — correct. IV. Senescence is promoted by ABA and delayed by Gibberellin — correct. All combinations I–IV are correct; hence option 4.