The correct option is B cytokinin
Coconut milk is a cytokinin. They promote cytokinesis. Cytokinesis is a process of cell division in which the cytoplasm divides to form two daughter cells.
Some functions of auxins include root initiation, initiation of flowering (e.g in pineapple), and helps in parthenocarpy i.e production of a seedless fruit without fertilization (e.g in tomatoes).
Some functions of gibberellins are they help in stem elongation (e.g in grapes), helps in improving the shapes of fruits(e.g in apples), promotes bolting (bolting is a process in which flowering stems are produced in some crops before they are harvested e.g onion, lettuce).
Some functions of abscisic acid are it inhibits germination and induces dormancy in seeds. Seed dormancy is the condition of seeds that are incapable of germinating even when the conditions suitable for seedling growth are supplied.