How many Indian Batsmen scored triple century in test cricket?

In the History of Indian Test cricket, Virender Sehwag and Karan Nair are the only two Batsmen scored triple century in single innings of a test cricket. Sehwag scored two triple centuries-against Pakistan (309) and against South Africa (319). Karan Nair Scored triple century with a score of 303 against England in 2016.