"How do they get to be kings, then?" Garion demanded.
"Some are born to it," Silk said. "The stupidest man in the world can be a king if he has the right parents. Sendarian kings have a disadvantage because they started so low."
"Low?"
"They were elected. Nobody ever elected a king before - only the Sendars."
"How do you elect a king?"
Sounds like this scene:
https://www.youtube.com/watch?v=Wx7zI...