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
In which of the following conditions is cardiac involvement NOT a usual feature ? 
Select and explain. 
A. Facio-scapulo-humeral dystrophy, B. Duchenne's muscular dystrophy, C. Friedreich's ataxia, D. Myotonic dystrophy
A: Facio-scapulo-humeral dystrophy
Answer: A: Facio-scapulo-humeral dystrophy 
Explanation: None