This is a question with answer options. What kind of thing would the answer to the question "What famous male vocalist has the same name as the composer of the opera Hansel and Gretel ?" be an entity, an abbreviation, a description, a human, a location, or a numeric value?

Choose from:
(a). description.
(b). entity.
(c). abbreviation.
(d). human.
(e). numeric.
(f). location.
(d).