Match the Plant Growth Regulators (PGRs) listed in Column A with their primary functions or characteristics in Column B.

	Column A		Column B
I)	Auxins	A	Internode elongation
II)	Gibberellins	B	Largely an inhibitor of growth activities, but can fit in both promoting and inhibiting groups.
III)	Cytokinins	C	Involved in cell division and cell enlargement.
IV)	Ethylene	D	Leaf formation