Correct option is B
Given:
The number of girls in a class is seven times the number of boys.
Solution:
Let,
The number of boys =
The number of girls =
Now,
The total number of students in the class =
The total number of children in the class must be multiples of 8.
In the given options, Option B - 52 is not a multiple of 8.
Therefore, the correct option is (B).