The eye lens is ____ when the ciliary muscles are in contraction, and it is _____ when the ciliary muscles are in relaxed state.
A
thin, thin
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B
thick, thick
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C
thin, thick
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D
thick, thin
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Solution
The correct option is D thick, thin The thickness of the eye lens is adjusted with the help of ciliary muscles. Contracted ciliary muscles result in a thicker lens, whereas the relaxed ciliary muscles result in a thinner lens.