Question

Ciliary muscle while reading a book and while driving.

• A. flattens
• B. expands
• C. contracts
• D. weakens

Answer 1

Answer: (B), (C)

The correct options are
B expands
C contracts

Ciliary muscles contract to make the eyelens thicker which reduces the focal length and thus enables us to see nearby objects (eg: while reading a book). It expand/relax to make the eyelens thinner and thereby increasing its focal length to enable us to see far off objects (eg: while driving).