Q.

Choose the correct statement with respect to absorption spectra of leaf pigments in absorbing the visible spectrum. 

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a

Chlorophyll a absorbs only red light but not blue light

b

Chlorophyll b absorbs only blue light but not red light

c

Carotenoids absorb mainly blue light but almost no red light.

d

Chlorophyll a absorbs more blue light than chlorophyll b

answer is C.

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Detailed Solution

Chlorophyll a and b absorb both blue and red lights. Chlorophyll a absorbs more red light than chlorophyll b and chlorophyll b absorbs more blue light than chlorophyll a. Carotenoids absorb mainly blue light and almost no absorption of red light. 

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