B may be less than or equal to a (like 4/3, b is equal to 3, less than 4; For example, seven out of seven, b equals seven, and a equals. )
The second one is wrong.
It says that B is not necessarily greater than A, which means that B may be greater than, equal to or less than A, but this is a false score, and B cannot be greater than A..
(i.e. denominator cannot be greater than numerator)
Hope to adopt! ! !