Consider the following statements regarding Universal Postal union (UPU): It is a UN-specialized agency. A non-member country of the United Nations cannot become a UPU member. It was established by the Treaty of Bern. Which of the statements given above is/are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: C

Notes:

Statement 1 is correct: It is a United Nations specialized agency. It is also the second-oldest international organization worldwide.
Statement 2 is incorrect: Any non-member country of the United Nations can become a UPU member provided that its request is approved by at least two-thirds of the member countries of the UPU. The UPU now has 192 member countries.
Statement 3 is correct: Universal Postal Union(UPU) was established by the Treaty of Bern in 1874.

Source: Article