Problem: Photophobia is extreme sensitivity to, or fear of, what?
======
A: light

Q: On which river does the legendary 'Lorelei' lie in wait?
A: rhine

Problem: In what branch of science would a unit of distance called a Parsec be used?
Answer: astronomy

Q: Which US President was a Rhodes Scholar at Oxford University?
-----
A: bill clinton

Q: What kind of animal is a 'green unicorn'?
What is the answer?

A: snake

Q: Langlauf (literally 'long-term' in German) refers to an endurance form of which sport?
What is the answer?

A:
skiing