$A$ woman is married for the second time. Her first husband was $ABO$ blood type $A,$ and her child by that marriage was type $O.$ Her new husband is type $B$ and their child is type $A B$.

What is the women's $ABO$ genotype and blood type?

  • A

    $I^{A} I^{O} ;$ Blood type $A$

  • B

    $I^{A} I^{B} ;$ Blood type $AB$

  • C

    $I^{B} I^{O} ;$ Blood type $B$

  • D

    $I^{O} I^{O} ;$ Blood type $O$

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If two persons with $‘AB’$ blood group marry and have sufficiently large number of children, these children could be classified as $‘A’$ blood group: $‘AB’$ blood group : $‘B’$ blood group in $1 : 2 : 1$ ratio. Modern technique of protein electrophoresis reveals presence of both $‘A’$ and $‘B’$ type proteins in $‘AB’$ blood group individuals.This in an example of

  • [NEET 2013]

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