Final answer:
Paul McCartney of The Beatles had his hair cut at the British Embassy in Washington during the band's first US visit in 1964.
Step-by-step explanation:
The student has asked which member of The Beatles got his hair cut at the British Embassy in Washington. The correct answer to this question is option B) Paul McCartney. McCartney's hair was snipped during The Beatles first visit to the United States in 1964, an event which was part of the initial wave of Beatlemania that was sweeping the nation. This haircut garnered media attention and is a part of the history and cultural impact of the band.