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B
Colour blind
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C
AIDS patient
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D
Deaf
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Solution
The correct option is A Haemophiliac carrier
Queen Victoria and many of her descendants carried what was once called "Royal disease"—now known as hemophilia, a blood clotting disorder. Hemophilia is caused by a mutation—likely spontaneous in Victoria's case—on the X chromosome and can be passed along the maternal line of families.