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The electrons released by splitting of water replace the electrons lost by

(a) ferredoxin Your answer
(b) PS II Correct
(c) PS I Your answer
(d) NADP⁺ Your answer

Your answer: Correct answer: (b)

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Explanation

Why (b) is correct

When P680 of PS II gives away its excited electrons, they are replaced by electrons from the splitting of water.

Why the other options are wrong

(a) · your answer Ferredoxin gets electrons from PS I.
(c) · your answer PS I gets its replacement electrons from PS II (via plastocyanin).
(d) · your answer NADP⁺ is the final electron acceptor; it does not lose electrons.

NCERT point: Water is the ultimate electron donor in oxygenic photosynthesis.

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