Through which of the following amendment act constitution provided "Maintaining the erstwhile representation of scheduled tribe and nonscheduled tribe in Assam legislation"?

Correct answer-1 Amendment Subject Year 90th Constitutional amendment act Maintaining the erstwhile representation of scheduled tribe and nonscheduled tribe in Assam legislation. 2003 91st Constitutional amendment act Limiting the size of the council of ministers and obstruction for defectors in holding positions. Central council of minister including prime minister not to exceed 15% of the total. Central council of minister including chief minister not to exceed 15% of the total. Added article 75(1A), Article 75((1B)), 164(1A), 164(1B), 361-B. Not to be disqualified if there is one-third defection according to the 10th schedule to be deleted. 2003 92nd Constitutional amendment act More language was added to schedule 8 like Bodo, Dogri, Maithili, Santali making the total 22. 2003 93rd Constitutional amendment act Empowering states to provide reservations in educational institutions except for institutions of minorities. 2005