Question

black and brown hair is colored by the pigment __________, whereas blonde hair is colored by __________.
multiple choice
eumelanin; pheomelanin
eumelanin; carotene
pheomelanin; eumelanin
pheomelanin; carotene
carotene; eumelanin

Explanation:

Eumelanin is the pigment responsible for black and brown hair colors. Pheomelanin is associated with blonde (and red) hair colors. Carotene is not the pigment for hair coloration in this context.

Answer:

eumelanin; pheomelanin