CBSE 2025 · Region 4 · Set 1 · Q20 · 1 mark
Assertion (A) : When ciliary muscles contract, eye lens becomes thin.
Reason (R) : Ciliary muscles control the power of the eye lens.
Official answer
From CBSE’s own marking scheme for this paper.
(D)
Assertion (A) is false, but Reason (R) is true.
The Human Eye and the Colourful WorldThe Human Eye and Power of AccommodationAnalyseassertion_reasonmedium
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.