Which pigment system is inactivated in red drop ?
(a) PS-I and PS-II
(b) PS-I
(c) PS-II
(d) of the above
Correct option**(c) PS-II**
Explanation :
The fall in photosynthetic yield beyond red region of spectrum (680 nm) is called red drop. Reaction centre of PS-II is P680 while that of PS-I is P700. So in the red drop reaction PS-II is inactivated.
