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A colourblind boy has two sisters , one colour blind and one normal. What can be the possible nature of their parents?

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A colourblind boy has two sisters , one colour blind and one normal. What can be the possible nature of their parents?

1) Colourblind father and carier mother
2) Both colourblind
3) Colourblind father and normal mother
4) Normal father and colourblind mother

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