The correct answer is Tehran. Located in northern Iran at the foothills of the Alborz mountain range, Tehran has served as the country's capital since 1795, when the Qajar dynasty established it as their seat of power, and it retained this status through the later Pahlavi era and after the 1979 Islamic Revolution that established the present Islamic Republic of Iran. Today Tehran is by far Iran's largest city, its main political, economic, financial and cultural hub, housing the presidency, parliament (Majlis) and most government ministries. Isfahan, the first distractor, served as the capital of the Safavid Empire from 1598 until 1722 and is famed for its grand Naqsh-e Jahan Square and Islamic architecture, but it has not been Iran's political capital for centuries. Shiraz, the second distractor, was briefly the capital under the Zand dynasty in the eighteenth century and remains celebrated as a centre of Persian poetry and gardens, yet it too lost capital status long ago. Mashhad, the third distractor, is Iran's second-most populous city and a major religious pilgrimage centre housing the shrine of Imam Reza, but it has never functioned as the national capital. A frequent exam confusion arises because Iran's long dynastic history means several cities have each been a capital at different points in time, tempting students to select any historically prominent Persian city rather than the current one. The revision takeaway is to anchor the answer firmly to present-day administrative status: Tehran has held that role continuously since the late eighteenth century, while Isfahan, Shiraz and Mashhad are historically or religiously significant but not the modern capital.
