Option 1: Kwashiorkor is a medical condition caused by severe protein deficiency in the diet. It is characterized by symptoms such as edema (swelling), hair loss, and skin discoloration.

Option 2: Haemophilia is not caused by nutritional deficiency. Haemophilia is a genetic disorder that affects blood clotting. It is caused by a deficiency or dysfunction of certain clotting factors in the blood, usually inherited from parents.

Option 3: Beriberi is a condition caused by a deficiency of thiamine (vitamin B1) in the diet. It can lead to symptoms such as muscle weakness, nerve damage, and cardiovascular problems.

Option 4: Marasmus is a condition caused by severe malnutrition, specifically a deficiency of calories and overall nutrient intake. It is characterized by wasting of muscle and body tissue, extreme weight loss, and overall weakness.

Therefore, the correct answer is option 2: Haemophilia. It is a genetic disorder, not caused by nutritional deficiency.