Consider the following statements in respect of PERT and CPM:
1. PERT is event-oriented while CPM is activity-oriente(d)
2. PERT is probabilistic while CPM is deterministi(c)
3. Levelling and smoothing are the techniques related to resource scheduling in CPM.
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