Sedum is a long day plant. Its critical duration of light is 13 hours. Under which of the following conditions would it flower?

Options

A.
B.
C.
D.

Answer

C

Explanation

A long day plant (LDP) is the one that flowers on photoperiods longer than critical day length. As the critical duration of light in Sedum is given to be 13 hours i.e., it required a minimum period of light of 13 hours to flower. Thus, the plant will flower only under the conditions shows in option (c).