Consider the following pairs:

Political Party	Leader
1. Bharatiya Jana Sangh	Dr. Shyama Prasad Mukherjee
2. Socialist Party	C. Rajagopalachari
3. Congress for Democracy	Jagjivan Ram
4. Swatantra Party	Acharya Narendra Dev

How many of the above pairs are correctly matched? [UPSC CSP 2024]