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QUICK ANSWER
"A quién" is a phrase which is often translated as "to whom", and "a qué" is a phrase which is often translated as "to what". Learn more about the difference between "a quién" and "a qué" below.
a quién()
A phrase is a group of words commonly used together (e.g., once upon a time).
a. to whom
Si no sabe a quién dirigir la carta, llame y pregunte.If you don't know to whom you should address the letter, inquire about it over the phone.
a qué()
A phrase is a group of words commonly used together (e.g., once upon a time).
