This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impotency, Virginity, pregnancy & aboion, Subject name: Forensic Medicine
False negative hydrostatic test in live fetus is for 
Select and explain. 
A. Atelectasis, B. Aicial respiration, C. Emphysema, D. Putrefaction
A: Atelectasis
Answer: A: Atelectasis 
Explanation: False negative hydrostatic test can be seen in :- 1. Diseases e.g. : acute edema, pneumonia, Congenital syphilis. 2. Atelectasis False positive hydrostatic test can be seen in :- 1. Presence of putrified gases. 2. Aificial inflation.