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: Pathology
[{'content': "Wahin's tumor is ? \nSelect and explain. \nA. Multifocal and bilateral, B. Multifocal and unilateral, C. Unifocal and bilateral, D. Unifocal and unilateral", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Multifocal and bilateral", 'role': 'assistant'}]