question_answer

Which of the following pairs are correctly matched? Select the correct answer using the codes given below the pairs.

Mechanism		Chain from which derived
1.	Whitworth quick return motion	Single slider crank chain
2.	Oldham's coupling	Four-bar chain
3.	Scotch Yoke	Double slider crank chain

Codes:

A) 1 and 2            

B) 1, 2 and 3

C) 1 and 3            

D) 2 and 3