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 injury of cell, except? 
Select and explain. 
A. Blebs, B. Amorphous densities in mitochondrial matrix, C. Loss of microvlli, D. Cellular swelling
B: Amorphous densities in mitochondrial matrix
Answer: B: Amorphous densities in mitochondrial matrix 
Explanation: Ans. is 'b' i.e., Amorphous densities in mitochondrial matrixFormation of amorphous densities in the mitochondrial matrix is a feature of irreversible injury and not reversible injury.