Mark the correct statement (w.r.t. sickle cell-anaemia)

  • A

    Homozygous individuals for $Hb^{S}$ are apparently unaffected

  • B

    Heterozygous individuals exhibit sickle-cell trait

  • C

    Heterozygous individuals are affected as well as carrier

  • D

    Homozygous individuals for $Hb^{A}$ show the diseased phenotype

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