Question

Which of the following are inversions of a double slider crank chain

         1. Whitworth return motion

         2. Scotch Yoke

         3. Oldham’s Coupling

         4. Rotary engine

         Select correct answer using the codes given below:                                       

         (a) 1 and 2                      (b) 1, 3 and 4

         (c) 2 and 3                      (d) 2, 3 and 4