(a) whether all the land encroached upon around the Tughlakabad Fort has been got vacated;
(b) if so, the number of unauthorised structures demolished and the total area of land that become available for development as a result thereof;
(c) whether any inquiry has been made and the responsibility has been fixed against the officers with whose connivance such unauthorised structures came up;
(d) if so, the outcome of the inquiry and the action taken against the offenders; and
(e) the steps being taken to check the recurrence of such unauthorised constructions/encroachments else-where in Delhi?