The correct answer is C. 1953.
The Fazal Ali Commission was a commission set up by the Government of India in 1953 to look into the question of reorganization of the Indian states. The commission was headed by Justice Fazal Ali, a former Chief Justice of the Jammu and Kashmir High Court. The commission submitted its report in 1955, and its recommendations were accepted by the government in 1956. The recommendations of the Fazal Ali Commission led to the reorganization of the Indian states on linguistic lines.
The other options are incorrect. Option A is incorrect because the Fazal Ali Commission was not formed in 1951. Option B is incorrect because the Fazal Ali Commission was not formed in 1966. Option D is incorrect because the Fazal Ali Commission was not formed in 1959.