Consider the following statements regarding radial cam nomenclature:
1. Motion of the trace point describes movement of the follower
2. The curve generated by the locus of trace point is called cam profile
3. Actual working curve of cam is called pitch curve
4. Smallest circle that can be drawn tangential to cam profile is called base circle
Which of these statements are correct?
(a) 1, 2 and 3 (b) 1, 3 and 4
(c) 1 and 4 only (d) 3 and 4 only