49. Consider the following statements:
The strategy to eradicate poliomyelitis in India comprised of
1. conducting national immunisation days
2. mopping up rounds with OPV
3. acute flaccid paralysis surveillance
4. public awareness through multimedia
Which of these statements are correct?
(a) 1 and 3 only
(b) 2 and 4 only
(c) 1, 2 and 3 only
(d) 1, 2, 3 and 4