Question

Assertion (A): When ciliary muscles contract, eye lens becomes thin.
Reason (R): Ciliary muscles control the power of the eye lens.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, and Reason (R) is not the correct explanation of Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

The ciliary muscles change the shape of the eye lens, allowing it to focus on objects at various distances. This is called accommodation.

Answer 1

The Correct Option is C

Assertion (A) is correct as contraction of ciliary muscles results in the lens becoming thinner. However, Reason (R) is incorrect. The ciliary muscles do not directly control the power of the lens; they alter the shape of the lens to focus on nearby or distant objects, thus adjusting its power. 
Therefore, the correct answer is option (3).