Question

Which one of the following is a plant growth regulator used for fruit set and development?

• A. IBA
• B. GA
• C. NAA
• D. BA

Hint:

Plant growth regulators:
- NAA: Fruit set and development.
- IBA: Root induction.
- GA: Stem elongation.
- BA: Shoot growth.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
This question tests knowledge of plant growth regulators and their functions.

Step 2: Detailed Explanation:
NAA (Naphthaleneacetic acid) is a synthetic auxin used for fruit set and development.
It promotes fruit setting and prevents fruit drop.
IBA (A): Indole-3-butyric acid (used for root induction).
GA (B): Gibberellic acid (promotes stem elongation).
BA (D): Benzyladenine (a cytokinin, promotes shoot growth).
Thus, NAA is used for fruit set and development.

Step 3: Final Answer:
Thus, NAA is used for fruit set and development, which corresponds to option (C).
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