What is a sentence with the word which?

(similarly to "that", "which" is used for a related clause, or a choice within a group)

"He was promoted to manager, which meant more responsibilities at work."

"Which shirt do you like better, the pink or the blue shirt?" "Which" child will get to lunch first?
Which of these is a good sentence?

Which and witch sound the same but have different meanings.

I am deciding which film to watch tonight.

Which one of you made this mess?

The solution has turned blue, which supports his theory.