Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

[Q]: Which is the penultimate letter of the Greek alphabet?
[A]: psi


[Q]: What is the name of the actor who plays Harry Potter in all the films?
[A]: daniel radcliffe


[Q]: Which dog appears in comics with Shaggy, Fred, Velma & Daphne?
[A]:
scooby-doo