(a) whether many companies which had got coal blocks for setting up of iron and steel plants have since sold allocated blocks for huge gains rather than going ahead with these projects;
(b) if so, the details of such companies;
(c) whether any investigation has been conducted in the matter;
(d) if so, the details thereof and the names of companies allotted coal blocks for the setting up of iron and steel plants, etc.; and
(e) the action taken against such companies?