Who among the following has authored the play ‘Nil Darpan’?

The correct answer is Dinabandhu Mitra.

Step-by-step Explanation:
1. Identify the Play: The play in question is 'Nil Darpan' (also spelled 'Nildarpan' or 'Neel Darpan'), which literally translates to "The Mirror of Indigo".
2. Historical Context: Written in 1858–1859 and published in Dhaka in 1860, this Bengali play highlighted the severe exploitation and oppression of peasant farmers by British indigo planters in Bengal. This socio-economic crisis led to the Indigo Revolt (Nil Bidroha) of 1859.
3. Authorship: The play was written by the prominent Bengali writer and dramatist Dinabandhu Mitra. It played a crucial role in raising awareness about the plight of indigo cultivators and is considered a landmark in the history of Bengali theater and Indian nationalist literature.
4. Analyzing the Options:
- Chittaranjan Das: A major political leader and lawyer during the Indian independence movement, co-founder of the Swaraj Party, but not the author of 'Nil Darpan'.
- Motilal Nehru: A lawyer and leader of the Indian National Congress, father of Jawaharlal Nehru, not associated with Bengali dramatic literature.
- Dinabandhu Mitra: The correct author of the play.
- Sarojini Naidu: A renowned Indian independence activist and poet (known as the "Nightingale of India"), who wrote poetry in English, not the Bengali play 'Nil Darpan'.