Sentences of a paragraph are given below. While the first and the last sentences (S1 and S6) are in the correct order, the sentences in between are jumbled up. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
S1. In Dr. Babasaheb Ambedkar
A. but also an elder statesman and national leader
B. we have not only a crusader against the caste system,
C. a valiant fighter for the cause of the downtrodden in India
D. whose contribution in the form of the Constitution of India
S6. will be cherished forever by posterity.