The Mandal Commission recommended-

The correct answer is Option (4) → 27 percent reservation of seats for OBCs in government jobs.

Option (1) Land ceilings exclusively for OBCs and SCs — Incorrect. The Commission did suggest other measures like land reform to improve the conditions of the OBCs, but not land ceilings for OBCs and SCs alone.

Option (2) Backward castes were not backward classes. — Incorrect. The Commission advised the opposite: that ‘backward classes’ should be understood to mean ‘backward castes’, since many castes other than the Scheduled Castes were also treated as low in the caste hierarchy.

Option (3) Reservations for OBCs in Parliament. — Incorrect. Its recommendation was about seats in educational institutions and government jobs, not seats in Parliament.

Option (4) 27 percent reservation of seats for OBCs in government jobs. — Correct. Finding that the backward castes had a very low presence in educational institutions and public services, the Commission recommended reserving 27 per cent of seats in educational institutions and government jobs for them.