A couple with a newborn baby is troubled that the child does not resemble either of them. Suspecting that a mixup occurred at the hospital, they check the blood type of the infant. It is type O. Because the father is type A and the mother type B, they conclude that a mixup has definitely occurred. Are they correct ? Give reason for your answer.
No, the parents are not correct.
The baby born to the father having blood group A and mother having blood group B can have any of the four possible blood groups : A, B, AB and O