The correct answer is C. Both (A) and (B).
The Protection of Civil Rights Act 1955 and Schedules Castes and Scheduled Tribes (Prevention of Atrocities) Act, 1989 are both laws enacted by the Indian government to protect Scheduled Castes and Scheduled Tribes from social injustice and exploitation.
The Protection of Civil Rights Act 1955 prohibits discrimination on the grounds of religion, race, caste, sex, place of birth, or any of them. It also prohibits forced labor and other forms of exploitation.
The Schedules Castes and Scheduled Tribes (Prevention of Atrocities) Act, 1989 provides for special measures to prevent atrocities against Scheduled Castes and Scheduled Tribes. It also provides for punishment for those who commit such atrocities.
Both laws are important in protecting the rights of Scheduled Castes and Scheduled Tribes in India.