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
What is the inheritance pattern of congenital adrenal hyperplasia ? 
Select and explain. 
A. AD, B. AR, C. XD, D. XR
B: AR
Answer: B: AR 
Explanation: Refer the byte "mendelian disorder and their inheritance pattern".