Choosing with أَيٌّ

Interrogative Sentences and Nouns

أَيٌّ asks which one. It is used as a muḍāf, so a following noun or attached pronoun completes the iḍāfah.

Form
Meaning

أَيُّ شَيْءٍ؟
Which thing?

أَيُّ الْفَرِيقَيْنِ؟
Which of the two groups?

أَيُّكُمْ؟
Which of you?