Task: Question Answering
Input (English): Which of the following statements is correct?

(A)The flavonoid class comprises flavonoids and isoflavonoids. (B)The digestibility and bioavailability of isoflavones in soya food products are not changed by processing. (C)ß-Carotene and lycopene can both act as provitamin A. (D)Carotenoids and flavonoids both belong to the polyphenol class.
Output (English): A