The correct answer is Bengal. Explanation & Key Takeaways: • Anushilan Samiti: • The Anushilan Samiti was founded by Pramathanath Mitra and includes Jatindranath Banerjee, Barindra Kumar Ghosh and others. • In April 1906, an inner circle within Anushilan (Barindra Kumar Ghosh, Bhupendranath Dutta) started the weekly Yugantar and conducted a few abortive ‘actions’. • In 1907, an abortive attempt was made by the Yugantar group on the life of a very unpopular British official, Sir Fuller • Anushilan group was arrested including the Ghosh brothers, Aurobindo and Barindra, who were tried in the Alipore conspiracy case, variously called Manicktolla bomb conspiracy or Muraripukur conspiracy. Related Concepts: • Pramathanath Mitra founded the Anushilan Samiti on March 24, 1902. • It had two branches: • the Jugantar Group in Calcutta • the Dhaka Anushilan Samiti in Dhaka. • The Samiti published "Bhavani Mandir" in 1905. • They advocated military training in their 1907 publication, "Vartaman Rananiti." • As a division of Anushilan Samiti, Dhaka Anushilan Samiti was established in November 1905. Pulin Bihar Das served as its leader when it was established. • After Pulin Das was detained in the Barisal Conspiracy case in 1913, the development of this samiti was put on hold. • Additionally, it should be noted that Dhaka Anushilan Samiti did not take part in the German World War I plot. • Anushilan Samiti was an Indian health club that anti-British revolutionaries utilised as a covert organisation. • In the early half of the 20th century, it encouraged the use of revolutionary violence to overthrow the British in India. • In Bengal, in 1902, a combination of neighbourhood gyms and youth organisations came together to form the organisation. • It had two significant, albeit independent, branches in East and West Bengal: the Jugantar group and Dhaka Anushilan Samiti, which was based in Dhaka (centred in Calcutta).