What color is a hippo's sweat?

If the color is orange-red, and red is the answer, then orange should not have been an option.

if its initially clear and then red-orange, then why aren't three of these answers correct?

new info for me.thanks

HipsterPixie12592, I agree... also it is not even sweat according to its own description so the question doesn't even make sense.

stretching it kids