Which is the largest city of Pakistan?

A. Sukkar
B. Karachi
C. Lahore
D. Hyderabad

Karachi is the largest city in Pakistan. It is the capital of Sindh province, located in the southern part of the country.
Explanation:
Karachi is Pakistan’s main seaport and a major industrial and commercial center.
It’s also the financial hub of Pakistan.
Karachi is located on the Arabian Sea coast, northwest of the Indus River delta.
The city’s development was initially driven by its role as a port for the Punjab region and the Indus River valley of British India.
The development of air travel further increased the city’s importance.