The correct option is A SCs and STs
Scheduled Castes and Scheduled Tribes are those groups of the people placed in the schedule of the Constitution of India. They are people which are considered low caste, inferior and untouchables. The Constitution empowers the State to make provisions or law for the advancement and upliftment of the SCs and STs. Politics is not left untouched by caste and religion influence. Thus, every political party appeal to SCs and STs to get maximum votes and works largely in favour of them.