The approval of budgetary and financial matters in the United Nations is the responsibility of the

The General Assembly is responsible for the approval of budgetary and financial matters in the United Nations. The General Assembly is the main deliberative body of the UN and consists of representatives from all member states. One of its functions is to approve the budget of the UN, which is proposed by the Secretary-General and covers the regular and peacekeeping expenses of the organization. The General Assembly also has the power to authorize additional expenditures and to review the financial reports of the UN. Therefore, the General Assembly is the correct option.