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प्रश्न
The change in focal length of an eye lens is caused by the action of the ______.
पर्याय
pupil
retina
ciliary muscles
iris
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उत्तर
The change in focal length of an eye lens is caused by the action of the ciliary muscles.
Explanation:
The ciliary muscles change the focal length of the eye lens by changing its shape.
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| A |  |
 |
B |
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