When did Gandhiji give the slogan of ‘Swaraj in a year’?

Who gave the slogan "DO OR DIE" and when ?

In which of the following year M.K. Gandhi wrote “Hind Swaraj”?

Where did Gandhiji initially forge the techniques of Satyagraha?

Who saved the life of Gandhiji in Bihar during Champaran Satyagraha?

How many years did Gandhi live in South Africa?