This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, 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: Facioscapulohumeral muscular dystrophy is a disorder characterized by muscle weakness and wasting (atrophy). This condition gets its name from the muscles that are affected most often: those of the face (facio-), around the shoulder blades (scapulo-), and in the upper arms (humeral).no cardiac involvement is seen Ref Harrison20th edition pg 2378