Theory of Machine
In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links

Will change
Will remain same
Will not occur
Could change or remain unaltered depending on which link is fixed

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Theory of Machine
In a mechanism, the fixed instantaneous centers are those centers which

Vary with the configuration of the mechanism
Remain in the same place for all configurations of the mechanism
Moves as the mechanism moves, but joints are of permanent nature
None of the listed here

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Theory of Machine
Kinematic pairs are those which have

Point or line contact between the two elements when in motion
Two elements that permit relative motion
Elements of pairs not held together mechanically
Surface contact between the two elements when in motion

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