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Proteinaceous pigment which control activities concerned with light is

1. phytochrome
2. chlorophyll
3. anthocyanin
4. carotenoids

Correct answer: phytochrome

Solution

Phytochrome is a proteinaceous pigment that detects light and controls plant developmental activities such as germination and flowering. The other options are pigments, but they are not the main light-regulating protein photoreceptor.

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