This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Pathology
Heart failure cells are seen in - 
Select and explain. 
A. Kidney, B. Heart, C. Lungs, D. Brain
C: Lungs
Answer: C: Lungs 
Explanation: Ans. is 'c' i.e., Lungs o Heart failure cells are hemosiderin containing macrophages in alveoli that are seen in left ventricular failure and denotes previous episodes of pulmonary edema.