When was the World Health Organisation established?

When was the World Health Organisation established?

A. April 6th 1948
B. April 7th 1948
C. April 5th 1948
D. April 8th 1948

The World Health Organization (WHO) is a specialized agency of the United Nations that is concerned with international public health. It was established on 7 April 1948, and is headquartered in Geneva, Switzerland. The WHO is a member of the United Nations Development Group.