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
Changes in middle ear after bih are observed in? 
Select and explain. 
A. Werdin's test, B. Ploucquet's test, C. Fodere's test, D. Breslau's test
A: Werdin's test
Answer: A: Werdin's test 
Explanation: 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.