ABA was discovered during
a)	Mid 1960s	b)	Mid 1959s	c)	Mid 1096s	d)	Mid 1996s

(a)

ABA was discovered during mid 1960’s.

During mid 1960s, three independent researches reported the purification and chemical characterisation of three different kind of inhibitors as inhibitor B, abscission II and dormin. Later, three were proved chemically identical. It was named Abscisic Acid (ABA)