A mother with blood group 'B' type has a child with blood group type 'O' . What is the possibility of the genotypes of that mother and father ?

Question

The correct answer is

(1) $I^AI^A$ ( father) and $ I^BI^O$ ( mother )

(2) $I^AI^B$ ( father) and $ I^BI^B$ ( mother )

(3) $I^AI^O$ ( father) and $ I^BI^O$ ( mother )

(4) $I^BI^O$ ( father) and $ I^AI^O$ ( mother )