Consider the following statements:

$($a$)$ PERT is activity$-$ oriented and adopts Deterministic approach

b$.$ CPM is event$-$oriented and adopts probabilistic approach.

c$.$ PERT is event oriented and adopts probabilistic approach.

Which of the above statements is$/$are correct?

Select one:

a$.1$ only

b$.1$ and $2$

c$.2$ and $3$

d$.3$ only