Step 1: Understanding UNICEF.
UNICEF is a United Nations agency working globally for the welfare, protection, and development of children, especially in developing countries. It focuses on health, nutrition, education, sanitation, and child rights.
Step 2: Analyzing the options.
(A) Incorrect, as this is not an official United Nations organization.
(B) Incorrect, because UNICEF is not a fellowship program.
(C) Incorrect, as the word “Education” alone does not represent UNICEF’s official name.
(D) Correct — UNICEF is officially known as the United Nations Children's Fund.
Step 3: Conclusion.
The correct expansion of UNICEF is United Nations Children's Fund.