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: ENT
[{'content': "Tobe Ayer's Test is seen in ? \nSelect and explain. \nA. Acute mastoiditis with lateral sinus thrombosis, B. Maxillary cancer with spread to nasal cavity, C. Rhinosporidiosis, D. Jugular vein thrombosis", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans' is'a'i.e., Acute mastoiditis with lateral sinus thrombosis", 'role': 'assistant'}]