Consider the following events:
1. Fourth general elections in India
2. Formation of Haryana state
3. Mysore named as Karnataka state
4. Meghalaya and Tripura become full states
Which one of the following is the correct chronological order of the above?
(a) 2, 1, 4, 3 (b) 4, 3, 2, 1 (c) 2, 3, 4, 1 (d) 4, 1, 2, 3