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 Assertion (A): No solid connection exists between the driving shaft and the driven shaft.                          

Reason (R): Energy transfer is by the change in moment of momentum

(a)  Both A and R are individually true and R is the correct explanation of A.

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

(c) A is true but R is false

(d) A is false but R is true

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