<prompt> Upturned Moustache sign or Antler sign is seen inMitral regurgitationAortic stenosisAortic regurgitationMitral stenosis  <response>: 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. 