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
Most common tumor of the anterior mediastinum tumour is - 
Select and explain. 
A. Thymoma, B. Lymphoma, C. Neurogenic tumour, D. Vascular cyst
A: Thymoma
Answer: A: Thymoma 
Explanation: None