Which major championship in golf does the claret jug refer to?

Answer 1

The Claret Jug, officially known as the Golf Champion Trophy, is presented to the winner of The Open Championship along with the Gold Medal. The winner is announced as the "Champion Golfer of the Year".

Answer 2

The British Open.

~that would be incorrect. It's actually referred to the Open Championship~

Answer 3

The Open Championship or British Open Championship. One of golf's 4 major championships.

Answer 4

The Claret Jug is the trophy won at the British Open.