Of the following who was the staunchest champion of the cause of the scheduled castes and scheduled tribes?

A. 89^th B. 90^th C. 95^th D. 97^th

A. Art. 342 B. Art. 343 C. Art. 344 D. Art. 345

A. October, 2005 B. October, 2006 C. October, 2007 D. October, 2008

A. Art. 164 B. Art. 165 C. Art. 166 D. Art. 167