Parts of sentences are given below in jumbled order. Arrange the parts in the correct order to form a meaningful paragraph. The first part 'R.' is fixed.

R. Mahatma Gandhi led a long struggle against untouchability
A. Dr B R Ambedkar, the father of the Indian Constitution, belonged to the lower
B. Such as entry into temples and public places
C. And worked for the welfare of the so called lower castes
D. Caste and made many efforts to secure basic rights for them