Answer:
A. chief Executive
Explanation:
on my experience all executives r appointees but tha president is chosen by majority
UNICEF
The UN International Children's Emergency Fund (UNICEF) was established by the General Assembly (GA res. 57 (I) (1946) to provide emergency assistance to children in war-ravaged countries following World War II. By GA res. 417 (V) (1950), the UN General Assembly charged it with addressing the needs of children in developing countries. GA res. 802 (VIII) (1953) extended UNICEF'S mandate indefinitely, with an emphasis on programmes giving long-term benefits to children everywhere, particularly those in developing countries, and changed the organization's name to the United Nations Children's Fund but retained the UNICEF acronym.
UNOSP
The UN Office for Project Services' (UNOPS') mission is to expand the capacity of the UN system and its partners to implement peace building, humanitarian and development operations that matter for people in need. Working in some of the world's most challenging environments, UNOPS' core services include project management, procurement, human resources management, fund management and UN common services.
I think the letter B is the answer