Question

كِتَابُ مَنْ؟ (whose book?)Here an interrogative noun مَنْ is not in the genitive case because it is indeclinable. There are certain indeclinable nouns in Arabic which remain unchanged.

Accepted Answer

I.e. it does not change to indicate its function.

Text	كِتَابُ مَنْ؟ (whose book?) Here an interrogative noun مَنْ is not in the genitive case because it is indeclinable.
Back Extra	I.e. it does not change to indicate its function.
Book Extra Notes	There are certain indeclinable nouns in Arabic which remain unchanged.

Indeclinable كِتَابُ مَنْ Book Interrogative Noun Genitive Case