nǎ​ge

which

哪个 (哪個) nǎ​ge
which pronoun
interrogative pronoun used to ask about a specific item or thing from a group

Which color do you like best?

who pronoun
interrogative pronoun used to ask about a specific person from a group

Which one of you is the teacher?

Frequency

Movie subtitles
93.0 per million appears in 34% of films
Written text
52.4 per million

Sources

Definitions
CC-CEDICT