উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
Washington D.C
The Pentagon is the headquarters building of the United States Department of Defense.
As a symbol of the U.S. military, the phrase The Pentagon is also often used as a metonym or synecdoche for the Department of Defense and its leadership.