A) Night-blindness
B) Muscular dystrophy
C) Astigmatism
D) Colourblindness
Correct Answer: D
Solution :
Colourblindness is sex-linked recessive disorder. In this disease the person can not distinguish red and green colour. Astigmatism is due to irregular cornea or lens, causing the image to be out of focus producing faulty vision. Muscular dystrophy is in born abnormality of muscle associated with dysfunction and ultimately with deterioration. Night blindness (Nyctolopia) is caused by deficiency of vitamin-A.
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