Consider the following statements:

1. The World Intellectual Property Organization (WIPO) is a specialized agency of United Nations System of Organization.
2. WIPO has its headquarters at Rome.
3. The Trade Related Aspects of Intellectual Property rights (TRIPS) Agreement is binding on all WTO members.
4. Least developed country members of WTO are not required to apply the provisions of TRIPs Agreement for a period of 20 years from the general rate of application of the Agreement.

Which of the statements are correct ?