A manned 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
AO positive
BA positive
CB positive
DCannot be determined on the basis of the given data
Answer & Solution
Correct answer: D. Cannot be determined on the basis of the given data
UPSC CSE Prelims 2011 (GS-I, Set A), Q.66. Official answer key: D.
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