Consider the following statements:

Cam followers are generally classified according to 1). the nature of its motion 2). the nature of its surface in contact with the cam 3). the speed of the cam Which of the statements given above are correct?

(a) 1,2 , and 3

(b) Only 1 and 2

(c) Only 2 and 3

(d) Only 1 and 3.