Explanation:

- B.R. Mehta Committee (1957): This was the first committee set up to evaluate the Community Development Programme, leading to the establishment of Panchayati Raj Institutions in India.

- Ashok Mehta Committee (1977): Tasked with reviewing the Panchayati Raj system and recommending measures for its revitalization.

- G.K.V. Rao Committee (1985): Focused on strengthening Panchayati Raj institutions, emphasizing the importance of revenue generation at the grass-root level.

- L.M. Singhvi Committee (1986): Suggested constitutional recognition for Panchayati Raj institutions, which eventually led to the 73rd Constitutional Amendment in 1992.

- Option 1: Incorrect order; Option 3: Incorrect order; Option 4: Incorrect order.

- Option 2: Correct Order (III, I, IV, II)