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
False -ve hydrostatic test in live born fetus is for- 
Select and explain. 
A. Atelectasis, B. Meconium aspiration, C. Emphysema, D. Putrefaction
A: Atelectasis
Answer: A: Atelectasis 
Explanation: Hydrostatic (Raygat's) test is false negative in atelectasis and diseases like acute pulmonary edema, pneumonia and congenital syphilis etc.