(a) whether a large number of vacancies/posts reserved for SCs,STs and OBCs are being de-reserved and filled by others despite imposition ban on de-reservation of vacancies reserved for these categories vide DOPT O.M. No. 36012/6/88-Estt.(SCT) dated 25.4.1989;
(b) if so, the reasons therefor; and
(c) the details of the instances where vacancies/posts reserved for these categories have been de-reserved and filled by persons other than those for whom these were reserved since 01.04.1989 under the Ministry?