Question

Assertion: In a hinge joint, movement occurs primarily in one plane.

Reason: The bone ends are shaped to allow sliding in all directions.

Options

• Both (A) and (R) are true, and (R) is the correct explanation of (A).

• Both (A) and (R) are true, but (R) is not the correct explanation of (A).

• (A) is true, but (R) is false.

• (A) is false, but (R) is true.

Answer 1

(A) is true, but (R) is false.

Explanation:

The assertion is correct because hinge joints, such as those found in the elbow and knee, permit movement in only one direction, similar to the way a door hinge works.

The reason is incorrect because hinge joints do not allow movement in all directions; this type of movement is actually provided by a ball-and-socket joint, not a hinge joint.