Which among the following are plant hormones?

(A) Auxin
(B) Gibberellins
(C) Oestrogen
(D) Abscisic acid

Choose the correct answer from the options given below:

(A), (B) and (D) only

The correct answer is Option (2) → (A), (B) and (D) only

To identify the plant hormones from the list, let's look at the function and source of each:

• (A) Auxin: A primary plant hormone responsible for cell elongation, apical dominance, and phototropism (bending toward light).
• (B) Gibberellins: These are crucial for stem elongation, breaking seed dormancy, and stimulating flowering.
• (C) Oestrogen: This is a human/animal hormone (specifically a sex hormone) produced mainly in the ovaries. It is not classified as a plant hormone.
• (D) Abscisic acid: Often called the "stress hormone" in plants, it helps in stomatal closure during water scarcity and maintains seed dormancy.