A normal woman whose father was colourblind marries a normal man. What kinds of children would be expected and in what proportion

  • A

    Daughters normal, $50\%$ of sons colourblind

  • B

    Daughters normal, all sons colourblind

  • C

    $50\%$ of daughters colourblind, all sons normal

  • D

    All daughters colourblind, sons normal

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  • [AIIMS 1992]