What is Médecins Sans Frontières (MSF)?

1. (a)An agency formed by the International Olympic Committee (IOC) to check misuse of drugs by sports persons
2. (b)A non-governmental organization which specializes in international humanitarian aid and emergency medical assistance
3. (c)An organization to develop applications of nanotechnology in medicine
4. (d)An organization of medical practitioners funded by the European Union which carries out research against spread of AIDS