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The light reaction produces "assimilatory power" in the form of

(a) ATP and NADH Your answer
(b) NAD⁺ only Your answer
(c) ATP and NADPH Correct
(d) NADP⁺ only Your answer

Your answer: Correct answer: (c)

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Explanation

Why (c) is correct

The light reaction makes ATP and NADPH, together called assimilatory power, which are used to fix CO₂ in the Calvin cycle.

Why the other options are wrong

(a) · your answer NADH is made in respiration; photosynthesis makes NADPH.
(b) · your answer NAD⁺ is not a product of the light reaction.
(d) · your answer NADP⁺ is the oxidised form that is used up, not produced.

NCERT point: ATP from photophosphorylation; NADPH from the reduction of NADP⁺.

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