Consider the following statements:

1. 1.All types of elections in India are conducted through First past the post system.
2. 2.Election Commission of India does not supervise Panchayat and Municipal elections.
3. 3.President of India cannot remove an Election Commissioner before the expiry of his term.
4. 4.It is mandatory to appoint more than one Election Commissioner in the Election Commission.

How many of the above statements are correct?