V.T. Bhattathirippad and his friends conducted a "Yachana Yathra" in 1931 from 

Who is known as the mother of Indian Revolutions

Who organized the group called "Khudaikhitmatgars"

Mahatma : Life of Mohandas Karamchand Gandhi, the biography of Gandhiji is written by

Congress Session which decided to celebrate 26th January as Independence Day all over the country

The first sitting of Constituent Assembly of India was held on