Who highlighted the plight of the farmers of Champaran by writing under pseudonyms such as 'Dukhi', 'Dukhi Atma', 'Dukhi Hriday'?

Explanation

Pir Muhammad Munis, writing under the pen names ‘Dukhi’, ‘Dukhi Atma’ and ‘Dukhi Hriday’, highlighted the plight of the Champaran peasants by writing ‘Champaran Mein Andher’ (13 March, 1916), ‘Champaran Ki Durdasha’ (10 April, 1917) and ‘Dukhi Hriday’ (February, 1916). He also wrote articles on Mahatma Gandhi in Champaran, Hindu-Muslim unity, etc.