Answer:
(B) Karachi
Step-by-step explanation:
At the time of Pakistan's independence in 1947, Karachi was the largest city in terms of population. Karachi, located on the southern coast, had a significant population due to its strategic location as a major port city. It attracted people from various regions who sought economic opportunities and trade. Karachi continued to be the largest city in Pakistan until the 1950s when the capital was shifted to Rawalpindi and then later to Islamabad. However, Karachi remains one of the most populous cities in Pakistan.