This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Which of the following is an automsomal dominant metabolic disorder? 
Select and explain. 
A. Cystic fibrosis, B. Phenyl ketonuria, C. a-I antitrypsin deficiency, D. Familial hyper cholestrolemia
D: Familial hyper cholestrolemia
Answer: D: Familial hyper cholestrolemia 
Explanation: Answer is D (Familial hypercholesterolemia):