Which of the following is an accessory pigment for photosynthesis? (BHU Pre PG 2016)

✅Explanation:
Accessory pigments in photosynthesis are those that absorb light energy and transfer it to chlorophyll a, the primary pigment directly involved in the light-dependent reactions. While chlorophyll a captures light, accessory pigments expand the range of usable wavelengths, maximizing light absorption for photosynthesis.

• Here's why the other options are incorrect:
-(a) Phytochrome: It plays a role in sensing light and regulating plant growth responses.
-(b) Cytochrome: This pigment is primarily involved in cellular respiration.
-(c) Chlorophyll: Although chlorophyll b and other forms like chlorophyll c and d participate in capturing light, they are typically categorized as primary pigments directly involved in light-dependent reactions. However, in some contexts, they can also be considered accessory pigments because they transfer some absorbed energy to chlorophyll a.