Klien’s construction can be used when
(a) crank has a uniform angular velocity
(b) crank has non-uniform velocity
(c) crank has uniform angular acceleration
(d) crank has uniform angular velocity and angular acceleration
This question was posed to me in an interview.
This interesting question is from Method of Locating Instantaneous Centres in a Mechanism topic in chapter Velocity in Mechanisms of Machine Kinematics