Consider the following events :
1. The first democratically elected Communist Party government formed in a State in India.
2. Indiaās then largest bank, āImperial Bank of Indiaā, was renamed āState Bank of Indiaā.
3. Air India was nationalised and became the national carrier.
4. Goa became a part of independent India.
Which of the following is the correct chronological sequence of the above events?