A married couple adopted a male child. A few years later, twin boys were born to

CuriousTab

Question
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
Options
A. O positive
B. A positive
C. B positive
D. Cannot be determined on the basis of the given data

Correct Answer

O positive