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
True about myasthenia gravis - 
Select and explain. 
A. Associated with thymomoa in 3/4 of cases, B. Incremental response seen with repetitive electric stimuli, C. Skeletal muscle function improve after rest, D. ↑ Aceytylcholine receptor
C: Skeletal muscle function improve after rest
Answer: C: Skeletal muscle function improve after rest 
Explanation: None