WHO Baffles Me!

WHO has selected Sri Lankas Health Minister as its Chairman of Exexcutive Comittees.I am very proud of this as a Sri Lankan.But how do the select a person for this post?
Is it on health satistics of Sri Lanka?
Is it because he canvassed most?
Is it because nobody wanted the post?
Is it bacause he is the most suitable person in the world?
Is it bcause Sri Lanka has best health services in the whole world?