A. 1956
B. 1957
C. 1959
D. 1960
Explanation:
The city was built in 1960 to replace Karachi as the Pakistani capital, which it has been since 1963. Due to Islamabad’s proximity to Rawalpindi, they are considered sister cities. Compared to other cities of the country, Islamabad is a clean, spacious and quiet city with lots of greeneries.