Can a 'a negative' girl can marry a 'b positive' boy?

Answer 1

Yes sure, but pregnant girl should take special injection for this situation directly after delivery, because the child might be positive and mother is negative, the placenta will start releasing anti-bodies against the foreign positive, so the injection is given to kill those anti-bodies and so not causing trouble when next pregnancy happen.

An rH positive person can be heterozygous, so the combination given in the question can result in an rH negative baby, which will not cause any problems.

Blood type has no bearing on who can get married. That is a myth. Blood tests that are required before marriage are to test for STDs.

Answer 2

Yes, an A negative girl can marry a B positive boy. Blood type compatibility is not a factor that determines whether two people can marry. It's important for couples to have open communication and understanding about any potential health concerns that may arise.