The correct options are
A The practice of untouchability is discriminatory.
B The practice of untouchability is unjust.
C The practice of untouchability is inhuman.
In the practice of untouchability, the so called "untouchables" were treated in an inferior manner due to their position at the bottom of the ladder of caste system. This practice is inhuman, discriminatory, and unjust. After India's Independence, it was criminalised and abolished through Article 17 of the Constitution.