The chronological order of the events is as follows:
- Dinabandhu Mitra wrote Neeldarpan (1858-59): This play, which depicted the oppression of indigo farmers by British planters, was published in 1858-59.
- Satyendranath Tagore cleared the ICS (1863): He became the first Indian to succeed in the Indian Civil Service (ICS) examination in 1863. The examination was conducted by the Civil Service Commissioners in London.
- Swami Dayanand established Arya Samaj (1875): This Vedic reform movement was founded by Swami Dayanand Saraswati in Bombay in 1875.
- Bankim Chandra Chattopadhyay wrote Anandmath (1882): This famous Bengali novel, set against the backdrop of the Sannyasi Rebellion and containing the song 'Vande Mataram', was published in 1882.
Therefore, the writing of Neeldarpan is the earliest event among the choices provided.
