In which year did Devendra nath Tagore expel Keshav Chandra Sen and his faction out of the Brahmo Samaj?

Q. In which year did Devendra nath Tagore expel Keshav Chandra Sen and his faction out of the Brahmo Samaj?

(a) 1866

(b) 1867

(c) 1868

(d) 1869

Ans: (a) 1866