Directions: In the question given below, two statements are followed by two conclusions A and B. You have to take the two given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows the two given statements disregarding commonly known facts.
 

Statements:

All boys are girls.

No girl is a father.
 

Conclusions:

A: All girls are boys.

B: No boy is a father.