Among the following choose the correct statements with respect to action and absorption spectra of photosynthesis.
A. The absorption spectrum of Chlorophyll a superimposed-on chlorophyll b absorption spectrum.
B. Action spectrum of photosynthesis and absorption spectrum of chlorophyll a does not show one to one overlap
C. Chlorophylls absorb more red light and blue light than other spectral components of visible light. 
D. Carotenoids absorb more red light than chlorophylls.