Which famous murder-mystery play has been running in the west end since 1952 and has had the longest initial run of any show in history.

• The Mikado
• The Mousetrap
  Explanation:

  "The Mousetrap, a murder-mystery play by Dame Agatha Christie, has been running in the west and since 1952 and has had the longest initial run of any show in history."
• Both A and B
• None of the above