This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cellular Pathology, Subject name: Pathology
[{'content': 'All of the followings are signs of reversible cell injury; except: \nSelect and explain. \nA. Loss of microvilli, B. Cell Swelling, C. Bleb formation, D. Dense Mitochondrial deposit', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Dense Mitochondrial depositRef: Robbins and Cotran Pathologic Basic Disease 9th Ed; Page No-40Cell injuryReversible cell injuryIrreversible cell injury* Cellular swelling* Loss of microvilli* Formation of cytoplasmic blebs* ER swelling* Ribosomal detachment* Myelin figures* Clumping of nuclear chromatin* Flocculent, amorphous mitochondrial densities* Swelling & disruption of lysosomes* Plasma membrane damage* Pyknosis* Karyolysis* Karyorrhexis', 'role': 'assistant'}]