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
Thymoma is associated with - 
Select and explain. 
A. Myasthenia gravis, B. Scleroderma, C. Oesophageal atresia, D. Hypergammaglobulinemia
A: Myasthenia gravis
Answer: A: Myasthenia gravis 
Explanation: None