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: Medicine
Increased nuchal fold thickness is a feature of : 
Select and explain. 
A. Paul-Bunnel syndrome, B. De-pan syndrome, C. Down's syndrome, D. Cri-duchat syndrome
C: Down's syndrome
Answer: C: Down's syndrome 
Explanation: Answer is C (Down's Syndrome) : Ultrasonography in a case of Down's syndrome Q may reveal increased nuchal fold thicknessY (Note that this is also a .feature of Turner's Syndrome.Q