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: Surgery
Duchenne's muscular dystrophy affects which group of muscle s commonly: September 2009 
Select and explain. 
A. Calf muscles, B. Shoulder muscles, C. Forearm muscles, D. Respiaory muscles
A: Calf muscles
Answer: A: Calf muscles 
Explanation: Ans. A: Calf Muscles