The definition of "document" under the Bharatiya Sakshya Adhiniyam, 2023 exists to identify what kind of recorded matter can be produced and relied upon, and the four options can be tested against that idea.
Among the four, three directly satisfy the recording-through-letters-or-marks description, while the fourth stands apart on that test.
\[ \boxed{\text{Map}} \]A comparison of the four items against one another highlights which one is different in kind from the rest when tested for the qualities that mark something as a document.
Grouping caricature, private papers, and inscription together as letter-or-mark-based records leaves the map as the one that differs from that group.
Hence, the correct answer is Map.