AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(A) Both A and R are true and R is the correct explanation of A.
A convex mirror is used as a rear-view mirror because its outward-curving surface provides a wider field of view, allowing the driver to see more area behind the vehicle, despite forming a diminished image.
The Assertion is true — convex mirrors are indeed preferred as rear-view mirrors even though they give smaller images. The Reason is also true and directly explains why: the outward curvature gives a wider field of view, which is the actual reason for its preference. Since R correctly and completely explains A, option (A) is correct. Students often confuse this with (B); remember — the wider field of view IS the reason for using a convex mirror, so R is the correct explanation.