Match the plant hormones given in column I with their function/other name given in column II and choose the correct combination.
$\text{Column I}$ $\text{Column II}$
$\text{(plant hormone)}$ $\text{(function/ other name)}$
A. zeatin I. flowering hormone
B. florigen II. synthetic auxin
C. IBA III. cytokinin
D. NAA IV. natural auxin

A : Zeatin is derived from the purine base called adenine. Zeatin belongs to the family of plant-growth hormones called cytokinins and was discovered in immature corn kernels from the genus $Zea$.
B : Florigen (or flowering hormone) is the hypothesized hormone-like molecule responsible for controlling and/or triggering of flowering in plants. It is produced in the leaves, and acts in the shoot apical meristem of buds and growing tips.
C : Indole-3-butyric acid (IBA) is a natural plant hormone in the auxin family and is an ingredient in many commercial horticultural plant rooting products. It is used for stimulating plant growth and root formation.
D : Naphthalene acetic acid (NAA) is a synthetic plant hormone in the auxin family. It is toxic to plants at high concentrations. It induces the formation of more fertile branches in cotton plants.