Which of the following statement is true about the active revolutionary movement in India during the years of World War?
1) Chandra Shekhar Azad founded the Anushilan Samiti
2) Bhagat Singh was the founder of Naujawan Bharat Sabha
3) Prafulla Chaki established the Hindustan Republican Association
4) Shachindra Nath Sanyal was the founder of Yugantar