The correct answer is: A. In the year 1990
The Mandal Commission was set up in 1979 by the Janata Party government to identify the Other Backward Classes (OBCs) and recommend steps for their upliftment. The Commission submitted its report in 1980, but it was not accepted by the government. The report was accepted by the V.P. Singh government in 1990, and 27% reservation for OBCs in government jobs and educational institutions was announced.
Option B is incorrect because the Mandal Commission report was submitted in 1980, not 1988.
Option C is incorrect because the Mandal Commission report was accepted by the government in 1990, not 1985.
Option D is incorrect because the Mandal Commission report was submitted in 1980, not 1982.