'Doctors Without Borders (Medecins Sans Frontieres)', often in the news, is

1. A

   A division of World Health Organization

   A division of the World Health Organization would be a UN specialised-agency arm, such as a WHO programme or regional office. Médecins Sans Frontières is independent of WHO and is not a WHO division, so this option is not the key.

2. B

   A non-governmental international organization

   Doctors Without Borders (Médecins Sans Frontières, MSF) is a private, independent non-governmental international organisation. It delivers emergency medical aid in conflict, epidemic and disaster settings and is funded mainly by private donations, not by a UN or EU mandate. That NGO character is why (b) is the official key.

3. C

   An inter-governmental agency sponsored by European Union

   An inter-governmental agency sponsored by the European Union would be created by treaty among governments, such as ECHO as a Commission service. MSF is not an EU inter-governmental body, so this option is wrong.

4. D

   A specialized agency of the United Nations

   A specialised agency of the United Nations would sit in the UN system (WHO, UNICEF, UNHCR). MSF is not a UN specialised agency; it often works alongside UN agencies but remains a separate NGO. This option is therefore not the key.

Summary. Official key is (b) a non-governmental international organisation. Médecins Sans Frontières is an independent medical NGO, not a WHO division, not an EU inter-governmental agency, and not a UN specialised agency. It is known for emergency field hospitals and for speaking out on humanitarian access. Candidates should not equate a famous health NGO with the UN health architecture. Only (b) states its legal character correctly.