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Consider the following statements:

1.   The degree of freedom for lower kinematic pairs is always equal to one

2.   A ball-and-socket joint has 3 degrees of freedom and is a higher kinematic pair

3.   Oldham’s coupling mechanism has two prismatic pairs and two revolute pairs.

Which of the statements given above is/are correct?                                   

(a) 1, 2 and 3                  (b) 1 only

(c) 2 and 3                      (d) 3 only

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