For the following questions answer them individually
Buddha Purnima, celebrated by the devotees of Gautam Buddha, is celebrated in the Hindu month of _______________.
In 1928, the _____ was founded at a meeting in Ferozeshah Kotla ground in Delhi.
Amongst its leaders were Bhagat Singh, Jatin Das and Ajoy Ghosh.
Three of the following four are auxiliaries to trade, and therefore form a group. Which is the one that does not belong to that group?