The correct option is D Maintaining international peace and security
The General Assembly has supervisory, financial, deliberative, and electoral functions. It regulates the working of other organs of the UN. It approves the budget of the UN and makes recommendations based on the principles of peaceful cooperation. It elects the temporary members of UNSC and judges of the International Court of Justice (ICJ). It also elects the Secretary-General of the UN and the members of the Economic and Social Council (ECOSOC).