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
Upturned Moustache sign or Antler sign is seen in 
Select and explain. 
A. Mitral regurgitation, B. Aortic stenosis, C. Aortic regurgitation, D. Mitral stenosis
D: Mitral stenosis
Answer: D: Mitral stenosis 
Explanation: Mitral stenosis leads to increased left atrial and hence pulmonary venous pressures. The prominence of pulmonary veins on chest X-rays leads to Upturned Moustache sign or Antler sign.