Match List-I with List-II and choose the correct answer from the codes given below:
| List-I | List-II |
|---|---|
| a. IBA | 1. Seed dormancy |
| b. GA₃ | 2. Root development |
| c. ABA | 3. Fruit ripening |
| d. Ethylene | 4. Plant growth |
Codes:
- Aa-2, b-4, c-1, d-3
- Ba-4, b-1, c-2, d-3
- Ca-3, b-2, c-4, d-1
- Da-1, b-3, c-2, d-4
Show answer and explanation
Correct answer: (a) a-2, b-4, c-1, d-3
Explanation
- (a) IBA (indole-3-butyric acid), an auxin, → 2, root development: it is used as a rooting hormone for stem cuttings.
- (b) GA₃ (gibberellic acid) → 4, plant growth: it lengthens the stem, breaks seed dormancy and enlarges fruits such as grapes.
- (c) ABA (abscisic acid) → 1, seed dormancy: it is a growth inhibitor, the "stress hormone", which also closes stomata.
- (d) Ethylene, a gas, → 3, fruit ripening.
So the code is a-2, b-4, c-1, d-3.