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: Pathology
All of the following are autosomal dominant disorders except - 
Select and explain. 
A. Tuberous sclerosis, B. Polyposis coli, C. Cystic fibrosis, D. Myotonic dystrophy
C: Cystic fibrosis
Answer: C: Cystic fibrosis 
Explanation: Ans. is 'c' i.e., Cystic fibrosis