Detailed Solution:
The correct answer is “Reservation in promotions for SCs and STs”.
The Constitution (Seventy-seventh Amendment) Act, 1995, added clause (4A) to Article 16 of the Indian Constitution, enabling the state to provide for reservation in matters of promotion for Scheduled Castes (SCs) and Scheduled Tribes (STs) if they are not adequately represented in the services under the state.