Which of the following leaders is not associated with AITUC?

The correct option is Jayprakash Narayan.

The All India Trade Union Congress (AITUC) is the oldest trade union federation in India, established on October 31, 1920. Over its history, many prominent nationalist, socialist, and communist leaders have been associated with it, serving in various leadership capacities.

Let us analyze the association of the given leaders with AITUC:
1. M.N. Roy: Manabendra Nath Roy was a prominent revolutionary philosopher and political theorist. He was actively associated with the Indian trade union movement and served as the President of AITUC in 1929.
2. S.A. Dange: Shripad Amrit Dange was a founding member of the Communist Party of India and a towering figure in the Indian labor movement. He served as the General Secretary of AITUC for a long period and also as its President.
3. V.V. Giri: Varahagiri Venkata Giri, who later became the fourth President of India, was a dedicated trade unionist. He was one of the founders of the All India Railwaymen's Federation and served as the President of AITUC twice, in 1926 and 1942.
4. Jayprakash Narayan: Popularly known as JP or Lok Nayak, Jayprakash Narayan was a major leader of the socialist movement in India. While he was actively associated with the Congress Socialist Party (CSP) and led various railway and post-telegraph unions, he is primarily associated with the Hind Mazdoor Sabha (HMS) rather than AITUC.

Therefore, Jayprakash Narayan is the leader among the options who is not associated with AITUC.