Which of the following are examples of forced closed kinematic pairs?1. Cam and roller mechanism2. Door closing mechanism3. Slider crank mechanism4. Automotive clutch operating mechanismSelect the correct answer using the codes given below:

Which of the following are examples of forced closed kinematic pairs?

1.	Which of the following are examples of forced closed kinematic pairs?1. Cam and roller mechanism2. Door closing mechanism3. Slider crank mechanism4. Automotive clutch operating mechanismSelect the correct answer using the codes given below:
A.	1,2 and 4
B.	1 and 3
C.	2,3 and 4
D.	1,2,3 and 4
Answer» D. 1,2,3 and 4

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Which of the following are examples of forced closed kinematic pairs?1. Cam and roller mechanism2. Door closing mechanism3. Slider crank mechanism4. Automotive clutch operating mechanismSelect the correct answer using the codes given below:

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