Multiple choice general knowledge Capital of Vietnam is Sanaa Vientiane Phnom-Penh Hanoi Reveal answer Fill a bubble to check yourself D Correct answer Explanation Hanoi has been the capital of Vietnam since 1975 and remains its political and cultural center. Sanaa is the capital of Yemen, Vientiane is the capital of Laos, and Phnom Penh is the capital of Cambodia - all are incorrect options.