Wilting of leaves and fruits from plants is triggered by which of the following plant growth hormone ?

Abscisic acid

The correct answer is Option (4) – Abscisic acid

Abscisic acid (ABA) is a plant hormone that is responsible for wilting of leaves. ABA is a stress hormone that inhibits growth under stressful conditions.

Abscisic acid is one example of a hormone which inhibits growth.

Gibberellins help in the growth of the stem.

When growing plants detect light, a hormone called auxin, synthesised at the shoot tip, helps the cells to grow longer.

Cytokinins promote cell division, and it is natural then that they are present in greater concentration in areas of rapid cell division, such as in fruits and seeds. These are examples of plant hormones that help in promoting growth.