Correct Answer - C
Phytochrome is a type of pigment which absorbs red or far-red light and its absorbing region is closely associated with protein. The phytochrome pigment is found to be present m two photoreversible forms `P_(r)(P_(660)and P_(tr)(P_(730))`
`underset(("inative"))(P_(r))overset("Red light")underset(Far red)hArrunderset(("active"))(P_(f r))`
