The query seeks to identify the leader unconnected to the All India Trade Union Congress (AITUC). Below is an examination of each leader's relationship with AITUC:
M.N. Roy: A significant figure in Indian revolutionary and communist movements, which are closely linked to trade union activities, including AITUC.
S.A. Dange: A founding member of the Communist Party of India, Dange was substantially involved with AITUC.
V.V. Giri: His multiple tenures as President of the All India Trade Union Congress confirm his strong association with AITUC.
Jayprakash Narayan: While a prominent political leader and social reformer, his primary affiliations were with the Indian independence movement and subsequent social and political endeavors, with minimal or no direct connection to AITUC.
Consequently, the leader not associated with AITUC is: Jayprakash Narayan