Which of the following statements in photosynthesis are CORRECT? P. The absorption maxima for photosystem I (PS I) and PS II are 680 nm and 700 nm, respectively. Q. Photosynthetic reaction centre contains 300 chlorophyll molecules and the release of one molecule of oxygen requires a minimum of 8 photons. R. The non-photochemical quenching of excitation energy is enhanced by the presence of zeaxanthin. S. The photochemical splitting of water occurs in PS I.