Of the following which plant hormone inhibits growth?A. CytokininsB. GibberellinsC. AuxinsD. Abscisic acid

The correct answer is D. Abscisic acid.

Here’s a detailed explanation:

Cytokinins (A): These hormones generally promote cell division and growth. They are involved in processes like shoot and root development, delaying leaf senescence, and promoting plant growth.

Gibberellins (B): These hormones stimulate plant growth, especially stem elongation, seed germination, and flowering. They are associated with growth and elongation of cells.

Auxins (C): These hormones are involved in regulating plant growth, particularly cell elongation. They promote the growth of roots and are involved in the plant's response to light and gravity (phototropism and gravitropism).

Abscisic acid (D): This hormone inhibits growth. It plays a key role in stress responses, such as drought or environmental stress, by promoting seed dormancy, closing stomata, and generally reducing growth under unfavorable conditions.

Thus, Abscisic acid is the plant hormone that inhibits growth.