The provisions in the Ninth Schedule in the Constitution of India are made in order to

a) determine the criteria related to disqualification of Members of Parliament and State Legislatures on ground of defection 
 b) protect acts and regulations included in it from judicial review 
 c) list out the languages recognized by the Constitution 
 d) determine the powers, authorities, and responsibilities of Panchayats

Solution: b.

The 76^th Amendment Act of 1994 placed the Tamil Nadu Reservations Act of 1994 in the Ninth Schedule.

“In Indra Sawhney v. Union of India, the Supreme Court had limited the total quota to 50 per cent, a figure both States intend to exceed. Tamil Nadu is an exception as a constitutional amendment was passed in 1994 to allow the State to continue to set the limit for reservation at 69 per cent.”

http://www.thehindu.com/opinion/editorial/editorial-on-gujarat-patidar-agitators-a-misguided-surrender/article8537874.ece