Which vs. Who
Which
Definition
Which is a determiner and pronoun used to introduce a clause or indicate a choice among a set of options.
Who
Definition
Who is a pronoun used to refer to people, often introducing a clause that provides more information about a person.
Example
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I can't decide which book to read next.
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Do you know which restaurant serves the best pizza?
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She asked which dress she should wear to the party.
Example
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Do you know who is coming to the meeting?
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The teacher, who is very experienced, gave us helpful tips.
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She is the one who won the art contest.
Other: