The Supreme Court today refused to stay the Andhra Pradesh High Court order quashing 4.5 per cent sub-quota for minorities, within 27 per cent OBC quota in educational institutions. The apex court expressed unhappiness over Centre not placing any documents before the high court to support the policy of quota for minorities. It has asked the Centre to place supporting documents for providing 4.5 per cent quota to the minorities. The court will hear the matter on Wednesday.