Which writer does not belong to the angry young men movement?

The correct options are Seamus Heaney and Philip Larkin.

The "Angry Young Men" was a term coined in the 1950s to describe a group of mostly working- and middle-class British playwrights and novelists who expressed disillusionment with the socio-political status quo and traditional British class structures of the post-war era.
Here is a breakdown of why the options are classified as they are:
1. John Osborne: His landmark 1956 play Look Back in Anger is widely regarded as the catalyst for the movement, making him the central figure of the Angry Young Men.
2. Kingsley Amis: His famous 1954 satirical novel Lucky Jim capture the anti-establishment attitude and frustration with class-conscious academia, closely aligning him with this movement.
3. Seamus Heaney: He was a major twentieth-century Irish poet who began publishing in the 1960s. His work is rooted in the Irish landscape and Northern Irish socio-political struggles, associating him with the Belfast Group rather than the British Angry Young Men movement.
4. Philip Larkin: While active during the same era, Larkin is primarily classified as the leading figure of "The Movement," a group of English poets who favored clear, ironic, and traditional verse forms over modernist experimentations, distinguishing them from the Angry Young Men.

Consequently, Seamus Heaney and Philip Larkin do not belong to the Angry Young Men movement.