Under which Clause of Article 16, inserted by the Constitutional (77th

Under which Clause of Article 16, inserted by the Constitutional (77th Amendment) Act, 1995, stating that “Nothing in this Article shall prevent the State from making any provisions for the reservation in matter of promotion [with consequential seniority] to any class or classes of posts in the services under the State in favour of the Scheduled Castes and the Scheduled Tribes, which, in the opinion of the State, is not adequately represented in the services under the State” ?