This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
All are features of reversible cell injury EXCEPT 
Select and explain. 
A. ER swelling, B. Dens deposition of mitochondria, C. Bleb, D. Detachment of ribosome
B: Dens deposition of mitochondria
Answer: B: Dens deposition of mitochondria 
Explanation: Answer- B. DENS DEPOSITION OF MITOCHONDRIAThe ultrastructural changes (seen on electron microscopy) are:-Plasma membrane alterations - Blebbing blunting loss of microvilli.Mitochondrial changes - Swelling, small amorphous densities.Dilatation of ER and detachment of ribosomeNuclear alterations