<prompt> Atrial fibrillation may occur in all the following conditions, except?Mitral stenosisHypothyroidismDilated cardiomyopathyMitral regurgitation  <response>: Option A: MS -Trigger A. fibrillation. Option B: Hypothyroidism -Low voltage ECG, bradycardia, pericardial effusion. Option C: DCM -Damage to LA RA - A. fibrillation Option D: MR- Leakage blood from LV to LA-trigger A. fibrillation. 