Who among the following did not belong to Angry Young Men generation of British playwrights/novelists?

The correct option is J.B. Priestley.

The "Angry Young Men" was a literary and cultural movement of the 1950s in the United Kingdom. It consisted of a group of working- and middle-class British playwrights and novelists who expressed disillusionment with the traditional, elite British class system and post-World War II society.
Key figures associated with this group include:
- John Osborne: His landmark 1956 play, Look Back in Anger, became the defining work of the movement.
- Kingsley Amis (Amis Kingsley): His famous 1954 novel, Lucky Jim, captured the anti-heroic, anti-establishment attitude of the era.
- Colin Wilson: He gained widespread recognition with his 1956 work, The Outsider, which explored themes of alienation and non-conformity.

In contrast, J.B. Priestley (1894-1984) belonged to an older generation of British writers. He established his career well before the 1950s, writing famous works like the play An Inspector Calls (1945) and the novel The Good Companions (1929). Because his period of peak influence and his literary style predated the post-war disillusionment of the 1950s, he did not belong to the Angry Young Men generation.