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
Cystic fibrosis affects all system except - 
Select and explain. 
A. Respiratory, B. Endocrine, C. Hepatobiliary, D. Genitoutinaty
B: Endocrine
Answer: B: Endocrine 
Explanation: CF causes thick mucus that clogs ceain organs, such as the lungs, pancreas, and intestines. This may cause malnutrition, poor growth, frequent respiratory infections, breathing problems, and chronic lung disease.doesnt effect endocrine system Ref Robbins 9/e pg 178