Coconut water contains

Concept:

• Plant hormones or phytohormones are plant growth regulators that regulate the growth, development, reproduction, and death of the plant.
• There are different plant hormones such as ethylene, auxin, cytokinin, gibberellin, abscisic acid, etc.
• Coconut water represents the endosperm that is undergoing free-nuclear divisions, which is a type of cell division in which the nucleus divides multiple times before cell wall formation.

Explanation:

Option 1:

• Abscisic acid (ABA) is known as the stress hormone.
• It closes the stomata, causes abscission of plant organs, plant growth inhibitor, promotes dormancy, and works antagonistically to gibberellic acid/gibberellin.

Option 2:

• Auxin is another plant hormone. IAA (indole acetic acid) is a naturally occurring auxin.
• It is important in apical dominance, cell differentiation, elongation, tissue differentiation, etc.

Option 3:

• Cytokinin is another plant hormone that regulates plant growth and development.
• It promotes cell division, formation of leaves, formation of chloroplast, delays the process of senescence, etc.
• Zeatin is a hormone that belongs to the cytokinin family. It was discovered from corn Zea.
• The cytokinin in coconut water helps in the free-nuclear divisions of the endosperm that is taking place.

Option 4:

• Gibberellin is a plant growth regulator that has many physiological effects.
• Gibberellin plays a role in flowering, increases the length of the internode, delays senescence, and promotes rosette formation in cabbages.

Hence, the correct answer is option 3, Cytokinin.