Aleppo is a city in Syria , serving as the capital of the Aleppo Governorate, the most populous Syrian governorate.

Kirkuk is a city in Iraq , serving as the capital of the Kirkuk Governorate, located 238 kilometres north of Baghdad.

Mosul is a major city in northern Iraq situated on the west bank of the Tigris, opposite the ancient Assyrian city of Nineveh on the east bank.

Mazar-e Sharif, the city is in Afghanistan , 35 miles south of the border with Uzbekistan. Hence, B is the correct option.