The correct options are
A His involvement in the organisation, 'Abhinav Bharat'.
B His connections to the radical group, 'India House'.
Vinayak Damodar Sawarkar, also known as Veer Sawarkar, was a famous freedom fighter from Maharashtra. He established 'Abhinav Bharat' and was part of the radical group, 'India House', during his higher education. After the murder of the collector Jackson, the British came to know of his involvement in Abhinav Bharat and his connections to the 'India House'. He was pinned for the murder of collector Jackson, and arrested in the year 1910.