Match the following.

	Column I		Column II
a		i	They have no correlation between exposure to light duration and induction of flowering
b		ii	They require the exposure to light for a period less than the critical duration before flowering is initiated in them
c		iii	They require the exposure to light for a period exceeding well defined critical duration

	a	b	c
1.	i	iii	ii
2.	ii	i	iii
3.	i	ii	iii
4.	iii	ii	i

Some plants require the exposure to light for a period exceeding a well defined critical
duration. These plants are called long day plants. Others must be exposed to light for a period less than this critical duration before the flowering is initiated. These are called short day plants. Plants that have no correlation between exposure to light duration and induction of flowering are called neutral flowers.