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: Forensic Medicine
[{'content': "Changes in middle ear after bih are observed in? \nSelect and explain. \nA. Werdin's test, B. Ploucquet's test, C. Fodere's test, D. Breslau's test", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Werdin's test Werdin's test: Before bih middle ear contains gelatinous embryonic tissue which is replaced by air after respiration.", 'role': 'assistant'}]