The correct answer is (c) Istanbul.
Istanbul is a city in Turkey that straddles Europe and Asia. It was formerly the capital of the Roman Empire, the Byzantine Empire, and the Ottoman Empire. It is the most populous city in Turkey and the country’s economic, cultural, and historic center.
Istanbul is a major tourist destination, known for its historic buildings, mosques, palaces, and bazaars. It is also a major transportation hub, with two international airports and a busy seaport.
Adana is a city in southern Turkey. It is the capital of Adana Province and the sixth-largest city in Turkey. Adana is located on the Seyhan River, near the Mediterranean Sea.
Ankara is the capital of Turkey and the country’s second-largest city. It is located in the central Anatolia region of the country. Ankara is a major transportation hub and a center for government and business.
Izmir is a city in western Turkey. It is the third-largest city in Turkey and the largest city on the Aegean Sea. Izmir is a major port city and a center for trade, industry, and tourism.