As per ABO blood grouping system, the blood group of father is $B^+$ , mother is $A^+$ and child is $O^+$. Their respective genotype can be A. $I^B i/I^A i/ii$ B. $I^B I^B /I^A I^A /ii$ C. $ I^A I^B /iI^A /I^B i$ D. $I^A i/I^B i/I^A i$ E. $iI^B /iI^A /I^A I^B$ Choose the most appropriate answer from the options given below :