In a class, there are 21 boys who are over 160 cm tall. If these constitute three–fourth of the boys and the total number of boys is one–fourth of the total number of students in the class. What is the total number of girls in the class	Choose the correct choice from the following choices:
A) 22
B) 78
C) 267
D) 997
E) 722
22nswer:22
<result>A</result>
In a class, there are 21 boys who are over 160 cm tall. If these constitute three–fourth of the boys and the total number of boys is one–fourth of the total number of students in the class. What is the total number of girls in the class