Which musical, composed by Andrew Lloyd Webber, has run continuously in the West End since 1986, making it the longest-running show in that theatre district's history?

• A The Phantom of the Opera ✓
• B Les Misérables
• C Cats
• D Miss Saigon

The Phantom of the Opera opened at Her Majesty's Theatre in October 1986 and ran for over 35 years; the musical features songs including 'The Music of the Night'.