Explanation:

- Option 1: 1950-51

- This is incorrect. India was preparing for elections after becoming a republic in 1950, but voting took place later.

- Option 2: 1948-49

- Not possible. The process of setting up the election machinery started after the Constitution came into effect on January 26, 1950.

- Option 3: 1951-52

- This is correct. The first general elections in India were held between October 1951 and March 1952, defining a significant event in Indian democracy.

-

- Option 4: 1947-48

- Not feasible. India gained independence in 1947 but needed time to draft a constitution and form electoral processes.