Step 1: Understanding WIPO.
The World Intellectual Property Organization (WIPO) was established to promote the protection of intellectual property worldwide. It replaced BIRPI (Bureau International Réunie pour la Protection de la Propriété Intellectuelle), the predecessor organization that was responsible for the administration of the Paris and Berne Conventions.
Step 2: Explanation of the options.
- (a) GATT: GATT was replaced by the WTO, not WIPO.
- (b) BIRPI: WIPO replaced BIRPI, the organization that previously handled international intellectual property matters.
- (c) TPRM: This is not the correct entity.
- (d) PCT: The Patent Cooperation Treaty (PCT) is an international patent law treaty administered by WIPO, not replaced by it.
Step 3: Conclusion.
Therefore, the correct answer is (b) BIRPI.