7.
Incorrect.
9.
Correct!
Santa Claus’s sleigh is led by 9 reindeer: Vixen, Prancer, Comet, Cupid, Dunder, Blixem, Dasher, Dancer, and Rudolph. Their names first appeared in 1823 at the poem “The Night Before Christmas” and Rudolf was added later in the 20th century.
11.
Incorrect.