Consider the following pairs :

Party	Its 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 are correctly matched?

The correct option is Only two.

Let us analyze each of the given pairs to determine if they are correctly matched:
1. Bharatiya Jana Sangh - Dr. Shyama Prasad Mukherjee: This pair is correctly matched. The Bharatiya Jana Sangh was founded in 1951 by Dr. Shyama Prasad Mukherjee, who also served as its first president.
2. Socialist Party - C. Rajagopalachari: This pair is incorrectly matched. C. Rajagopalachari was the founder of the Swatantra Party in 1959. The Socialist Party, on the other hand, was led by figures such as Acharya Narendra Dev, Jayaprakash Narayan, and Ram Manohar Lohia.
3. Congress for Democracy - Jagjivan Ram: This pair is correctly matched. The Congress for Democracy (CFD) was a political party launched in 1977 by Jagjivan Ram, Hemvati Nandan Bahuguna, and Nandini Satpathy after they defected from the Indian National Congress (R).
4. Swatantra Party - Acharya Narendra Dev: This pair is incorrectly matched. Acharya Narendra Dev was a key theorist and leader of the Congress Socialist Party (founded in 1934) and later the Socialist Party. The Swatantra Party was founded by C. Rajagopalachari.

Therefore, out of the four pairs, only two (Pair 1 and Pair 3) are correctly matched.