Scores of Adults Aged 60 to 64 on a Common

Multiple Choice

Scores of adults aged 60 to 64 on a common IQ test are approximately Normally distributed with mean 90 and standard deviation 15.
The third quartile of the distribution of IQ scores of adults aged 60 to 64 is between

A) 90 and 105.
B) 105 and 120.
C) 90 and 75.
D) 60 and 75.