Final answer:
The 'untouchable' class in India are known as the Dalits. The Dalits, also known as untouchables, are considered to be outside and hierarchically below the four-tiered caste system in Hinduism.
Step-by-step explanation:
The 'untouchable' class in India are known as the Dalits, so the answer to your question is D) Dalits. They were likely the descendants of the populations that lived in south India before the arrival of the Aryans. They lie below the traditional four-tiered Hindu caste system, founded by the Aryans, consisting of the Brahmins, Kshatriyas, Vaishyas, and Sudras.
This group lies outside and hierarchically below the traditional four-tiered Hindu caste system, which was originated by the Aryans. These four castes (varnas) consist of the Brahmins (priests and scholars), the Kshatriyas (rulers and warriors), the Vaishyas (workers and farmers), and the Sudras (servants and laborers). The Dalits were denied many opportunities and were largely marginalized, leading to their classification as 'untouchables' by the rest of society.
Learn more about Indian Caste System