The genotype of B-group father of an O-group child is

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The genotype of B-group father of an O-group child is

1. I^OI^O
2. I^BI^B
3. I^AI^B
4. I^OI^B

Correct Option: B

If the child has O blood group – I° I° If father has B blood group it is either – I^B I^B or I^B I^o But if father has IB IB then child cannot have I° I°, so father must have I^B I^o.