Detailed Solution:
The correct answer is “Ambika Chakravarti”.
Ambika Chakravarti was not an early member of the "Naujawan-Sabha" formed in 1926 A.D. Ambika Chakravarti was a revolutionary and communist leader of the Indian independence movement. He was a leader of the Communist Party of India.
Naujawan Bharat Sabha was founded by Bhagat Singh in March 1926 .