UPSC
General Studies
Solved Paper - General Studies-2011
question_answer
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 0 negative. The blood group of the three sons is A positive, B positive a.id 0 positive. The blood group of the adopted son is
A) O positive
B) A positive
C) B positive
D) Cannot be determined on the basis of the given data