To classify Intellectual Property Right:
1. Intellectual Property Rights (IPR), such as patents, copyrights, and trademarks, protect intangible creations of the mind, not physical objects.
2. They are not fundamental rights (protected under Part III of the Constitution) or social rights, nor are they tangible as they lack physical form.
3. The correct classification is intangible right, governed by laws like the Patents Act, 1970, and Copyright Act, 1957.
Therefore, the correct answer is (4) Intangible right.