Examine the two statements A and B and choose the correct option from those that follow the statements?

A: If speed of an object is changing, then its velocity must be changing

B: If the velocity of an object is changing, then its speed may or may not be changing

Velocity = speed + direction, so if speed is changing, velocity must be changing. For understanding the statement B, think of uniform circular motion where speed is not changing but velocity is changing and in parabolic motion of a projectile, both speed and velocity are changing.