Subject Category > General Knowledge

Q. A married couple adopted a male child. A few years later, twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is

A) A positive

B) O positive

C) Cannot be determined on the basis of the given data

D) B positive

O positive

Additional Information > Exam point of View

In this case, the biological sons' blood groups are determined by the ABO and Rh factor inheritance from the parents, with the first son being A positive, and the second son showing a possible compatibility for a B positive blood group.
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