<prompt> A 45-year old male presented with severe respiratory distress. OE he had pedal edema, bilateral crepitation on auscultation. He was admitted to emergency department and expired 2 days of admission. Lung biopsy done suggested the following. What is your diagnosis?CMV pneumonitisSmall cell Ca lungTuberculosisHeart failure cells  <response>: Ans. d Heart failure cellsThe lung biopsy shows intra-alveolar transudate granular pale pink material along with alveolar micro-hemorrhages hemosiderin-laden macrophages heart failure cells seen in left-sided congestive heart failure. 