Solution:
Dalits was the name given to lower caste people in India. They were often referred to as untouchable. They were mostly poor and ill-treated. They were forced to perform some minimal jobs.
People of high caste are not called Dalits. So this is an incorrect option.
People of the middle caste are not called Dalits. So this is an incorrect option.
Therefore, the correct answer is option(A).
