Answer:
A, B and AB blood groups.
Step-by-step explanation:
If both a man and a woman have the blood type AB, the couple's children have A, B and AB blood groups. the reason behind these types of blood groups are the similar blood group of both male and female. According to blood type chart, a male with AB blood group married with female with the same blood group AB, it will never produce O blood group only A, B and AB blood groups.