Quien and A

Hola E. L.

Yes, the sentence “No había ninguna persona a quien pudiera preguntar” is grammatically correct in Spanish. Here's why: the verb “preguntar” is typically used with the preposition “a” when referring to the person being asked — just like you’d say preguntar a alguien (to ask someone).

When you use a relative clause with “quien” (meaning “who” or “whom”), you must keep the original preposition that the verb requires. Since “preguntar” needs “a”, you say “a quien” to maintain the structure: No había nadie a quien pudiera preguntar.

You could also phrase it using “la que”, like this:
“No había ninguna persona a la que pudiera preguntar.”
That version is equally correct and sounds slightly more formal or literary, but both are common and natural.

Let me know if you’d like more examples using other prepositions like de quien or con quien — they follow the same rule!

Un saludo

Silvia