The correct answer is "what, which." In French, "quel" and "quelle" are interrogative adjectives that mean "what" or "which" in English. They are used to ask questions about the identity or characteristics of a person or thing. "What" is used when the range of choices is unknown, while "which" is used when the range of choices is known. So, "what, which" is the correct translation for "quel, quelle".