Non-minimum phase transfer function is defined as the transfer function

1. which has zeros in the right-half of \(s\) plane.

2. which has zeros only in the left-half of \(s\) plane.

3. which has poles in the right-half of \(s\) plane.

4. which has poles in the left-half of s plane.

Of these
(a) 1 and 3 are correct
(b) 1 and 4 are correct
(c) 2 alone is correct
(d) 2 and 3 are correct.