Ashgabat is the capital of which state

Ashgabat is the capital of Turkmenistan. It is known for white marble architecture broad avenues and monumental squares. The city lies between the Karakum Desert and the Kopet Dag mountains. Options list Tajikistan Azerbaijan and Armenia which have the capitals Dushanbe Baku and Yerevan. Since Turkmenistan is not offered None of these is correct.