Wizards' Ordinary Magic and Basic Aptitude Test

The W.O.M.B.A.T. test is a series of tests presented on JK Rowling's personal website (http://www.jkrowling.com). Presented partially as a Harry Potter trivia test, there are nevertheless additional information that can be gleaned from the questions.

3rd test
Became available when the "Do not disturb" sign was removed from the hallway door on June 13, 2007.

All but one of the following are true:
 * Patronuses vary in strength according to the animal's form they take
 * There is only one documented case of a person surviving the killing curse
 * Hags have rudimentary magic similar to that of trolls
 * No defensive spell exists to counter the Cruciatus curse
 * Giants have traditionally allied themselves with the Dark Arts

Only one of the following is true:
 * To become an Inferious, you must be murdered by dark magic
 * Occlumency can guard against posession
 * Dementors are unknown in tropical climates
 * A curse is stronger than a hex, which is stronger than a jinx
 * If a werewolf mates during the full moon, the baby will be a cub rather than human