Which of the following is used to artificially ripen banana fruits?

Which one of the following synthetic growth regulators is used to promote synchronized flowering in pineapple?

What is the influence of ethylene on plants?

The shedding of leaves,flowers,or fruits due to a change in the hormonal balance in plants is referred to as:

$A$ farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth regulator can be applied to achieve this?

$PGR$ which was discovered by Cousins .........