"He played a leading role in the development of the internationalist outlook of the Indian freedom struggle. He sought foreign allies for India and forged links with movements for freedom and democracy all over the world. In 1927, his efforts paid off and the Congress was invited to attend the Congress of oppressed nationalities in Brussels in Belgium. The meeting was called to coordinate and plan a common struggle against imperialism. He represented India and was elected to the Executive Council of the League against imperialism that was born at this meeting". Who was he?