This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Medicine
The following are autosomal dominant disorders except 
Select and explain. 
A. Mytonic dystrophy, B. Von Willebrand disease, C. Haemochromatosis, D. Marfan's syndrome
C: Haemochromatosis
Answer: C: Haemochromatosis 
Explanation: Iron overload indicates accumulation of iron in the body from any cause. The most impoant causes are hereditary haemochromatosis (HHC), a genetic disorder, and transfusional iron overload, which can result from repeated blood transfusions Ref Robbins 9 /e pg 170