Which school did Boris Johnson attend?

Boris Johnson attended Eton College, which is one of the most prestigious boarding schools in the United Kingdom. Eton is known for its rigorous academic programs and has a long history of educating many notable figures, including numerous British Prime Ministers, members of the royal family, and prominent leaders in various fields. Johnson's time at Eton played a significant role in shaping his educational background and social development, leading to his later studies at Balliol College, Oxford, where he pursued Classics.

The other options represent different educational institutions with their own unique backgrounds. Westminster School is known for its historical significance and proximity to Westminster Abbey, Oxford High School is a well-regarded girls' school connected to the University of Oxford, and St. Paul's School is also a prestigious institution located in London. While each of these schools has its merits, Eton College is the one that Johnson specifically attended, making it the correct answer to the question.