The odd item from the list is "tragedy".
This is because tragedy is a type of drama, while the other options - prose, poetry, and drama - are all different forms of literature.
Prose refers to written or spoken language in its ordinary form, without any metrical structure.
Poetry, on the other hand, is a form of literary expression that uses meter, rhyme, and other literary techniques to create an emotional response in the reader.
Drama refers to a form of literature that is meant to be performed, often with dialogue between characters and a plot that unfolds through a series of scenes.
Tragedy is a sub-genre of drama that typically involves a serious or tragic ending, often with the death of the protagonist. While it is a type of drama, it is not a distinct form of literature like prose or poetry.