Correct Answer:
B. Turkey
Explanation:
The correct answer is Turkey because it is currently the only nation with a predominantly Muslim population that holds official membership within the North Atlantic Treaty Organization (NATO).
- Step 1 (Geopolitical Entry): Turkey officially joined the defensive alliance on February 18, 1952, during the early stages of the Cold War to protect its sovereign borders against regional threats.
- Step 2 (Strategic Importance): Turkey commands the second-largest standing military force within NATO after the United States and controls the vital Bosphorus and Dardanelles straits, linking the Black Sea to the Mediterranean.
- Incorrect Options:
- Pakistan is incorrect because it is designated historically as a Major Non-NATO Ally (MNNA) by the United States, but holds no voting membership in NATO.
- Saudi Arabia is incorrect because it maintains external bilateral security relationships with Western powers but remains outside the North Atlantic treaty network.
- Egypt is incorrect because it is an African Arab state that interacts as an MNNA and a Mediterranean Dialogue partner, but is not a full alliance member.