Fantasy Dragons

In Episode 2 of the current series of University Challenge, Corpus Christi College, Oxford successfully answered the following three questions posed by Jeremy Paxman:
• Kalessin, who transports Ged and Arren to Roke is the oldest dragon in works by Ursula Le Guin set in which world?
• In Tolkien’s The Silmarillion which dragon is described as the first of the Urulóki, the fire-drakes of the North?
• In Harry Potter and the Philosopher’s Stone what is the name of the Norwegian Ridgeback dragon that Hagrid illegally breeds?
Do you know the answers?