The evidentiary tradition this Act belongs to has long given illustrative examples of what counts as a document, and comparing those illustrations to the four options here also settles the question.
Since three of the options match the long-recognised illustrations of what constitutes a document, and the caricature does not fit that category at all, the item that is not a document is the caricature.
Another workable test is to ask what the creator of each item actually intended it to do, since the statutory concept of a document turns on an intention to express, describe, or record something meant to be understood as information.
Applying the intention test consistently across all four items, three are created with an intention to record or convey information, while the caricature is created with an artistic or satirical intention instead.
That is why the caricature is the item that is not a document under the Bharatiya Sakshya Adhiniyam, 2023.