chlorophyll of photosystem?

Question

The reaction-center chlorophyll of photosystem I is known as P700 because
A) there are 700 chlorophyll molecules in the center.
B) this pigment is best at absorbing light with a wavelength of 700 nm.
C) there are 700 photosystem I components to each chloroplast.
D) it absorbs 700 photons per microsecond.
E) the plastoquinone reflects light with a wavelength of 700 nm.

a littel help plsss

Answer 1

B.

Chlorophyll P700 is named after the wavelength of light it absorbs.