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
What is the most common tumor of mediastinum? 
Select and explain. 
A. Neurogenic, B. Thymoma, C. Lymphoma, D. Metastatic tumor
A: Neurogenic
Answer: A: Neurogenic 
Explanation: Answer- A. Neurogenicthe most common mediastinal masses are neurogenic tumors (23%), thymomas (21%), lymphomas (13%) and germ cell tumors (12%). Mediastinal masses are most frequently located in the anterosuperior mediastinum (54%), with the posterior (26%) and middle mediastinum (20%) being less frequently involved