Q. During which session of congress Chittaranjan Das was elected its President but Hakim Ajmal Khan presided over the session because he was arrested well before the session started?
Answer: Ahmedabad session of 1921
Notes: During Ahmedabad Session of INC (1921) , Chittaranjan Das was elected its President but Hakim Ajmal Khan presided over the session because C. R. Das was arrested well before the session started for supporting the non- cooperation movement.

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