Which of the following should be avoided while marriage?

Study Group
#1

which of the following should be avoided while marriage?
a) boy Rh -(ve) and girl Rh +(ve)
b) boy Rh +ve and girl Rh +ve
c) boy Rh +ve and girl Rh -ve
d) boy Rh -ve and girl Rh -ve

Ans C