The correct answer is B. Haemophilia.
Haemophilia is a hereditary bleeding disorder in which the blood’s ability to clot is impaired. This means that people with haemophilia may bleed for longer than normal after an injury, or they may bleed spontaneously. There are two main types of haemophilia: haemophilia A and haemophilia B. Haemophilia A is caused by a deficiency of factor VIII, while haemophilia B is caused by a deficiency of factor IX.
Cataract is a clouding of the lens in the eye. It is the most common cause of blindness in the world. Cataracts can be caused by a number of factors, including age, diabetes, and certain medications. However, they are not hereditary.
Pellagra is a disease caused by a deficiency of niacin (vitamin B3). It is characterized by skin lesions, diarrhea, and mental changes. Pellagra is not hereditary.
Osteoporosis is a disease that causes the bones to become weak and brittle. It is most common in older people, but it can also affect younger people who have certain medical conditions. Osteoporosis is not hereditary.
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