The right answer is A.
Photosynthesis is directly related to the energy that will be able to use the plant. In this case, it is therefore the energy delivered by the light that is used.
Chlorophyll A has a large absorption spectrum in blue / violet (430 nm) and red (680 nm)
Chlorophyll B has a large absorption spectrum in blue (460 nm) and red (630 nm)
Carotene has a large absorption spectrum in blue (450 nm) and green (500 nm), which explains their orange-red color.
Xanthophylls have a large absorption spectrum in blue (450 nm) and cyan (480 nm). They are rather orangey yellow. This is the hydroxyl form of carotenes. They have the same role as carotenes.
For the green color:
It is customary to say that since plants are green, they absorb all the colors of the spectrum except green. This statement is true, only in part.
Indeed, as demonstrated by Folta and Marihnich (2007), the green light partly manages:
-> The closure of stomata
-> Flowering time
Its effects are generally opposed to the effects of blue and red colors. It is therefore not totally useless and must be taken into account.
