Explanation:

- The first linguistic state in India was Andhra Pradesh. It was formed based on the Telugu language.

- Option 2: 1951 is incorrect. In this year, India was in the early stages of its post-independence consolidation.

- Option 3: 1952 is relevant because this was the year of Potti Sreeramulu's fast, which ultimately led to the creation of Andhra State.

- Option 4: 1953 is the correct answer.

- Andhra Pradesh was officially formed on October 1, 1953, after Potti Sreeramulu's protest and subsequent death highlighted the need for reorganization.

- Option 1: 1957 is incorrect. By then, states were already being reorganized on a linguistic basis following the success of Andhra Pradesh.

Correct Answer: Option 4: 1953