At the instantaneous center, the velocity of the moving lamina at any instant is A. Zero B. Maximum C. Minimum D. Varying

The correct answer is: A. Zero

The instantaneous center of rotation (ICR) is a point on a rigid body that, at any instant, has zero velocity relative to the ground. This means that the velocity of the moving lamina at any instant is zero at the ICR.

Option B is incorrect because the velocity of the moving lamina at any instant is not maximum at the ICR.

Option C is incorrect because the velocity of the moving lamina at any instant is not minimum at the ICR.

Option D is incorrect because the velocity of the moving lamina at any instant is not varying at the ICR.