Correct Answer:
B. 1962
The Rawal Dam, a crucial water reservoir for Islamabad and Rawalpindi, was constructed and completed in 1962. This foundational infrastructure project was vital for meeting the water supply needs of the rapidly developing capital region.
- Options A (1955), C (1971), and D (1980) are incorrect years for the completion of Rawal Dam. The dam's construction was a significant undertaking in the early 1960s, making 1962 the accurate completion date.