The Biggest Stories of January 21, 2016

The University of Hyderabad revokes the suspension of four Dalit PhD scholars who had been expelled along with Rohith Vemula; Senior Congress leader Kamal Nath says in an interview at Davos that the differences between the two sides on Goods and Services Tax (GST) can be ironed out; A high-profile inquiry in the UK says Russian President Vladimir Putin "probably approved" the assassination in 2006 of a former Russian spy; and much more on the news wrap of the day.