সঠিক উত্তর হচ্ছে: op1 and 3 only
ব্যাখ্যা:
A United Nations peacekeeping mission has three power centers. The first is the Special Representative of the Secretary - General, the official leader of the mission. This person is responsible for all political and diplomatic activity, overseeing relations with both the parties to the peace treaty and the UN member - states in general. They are often a senior member of the Secretariat.