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
Irreversible cell injury is characterised by which of the following? 
Select and explain. 
A. Mitochondrial densities, B. Cellular swelling, C. Blebs, D. Myelin figures
A: Mitochondrial densities
Answer: A: Mitochondrial densities 
Explanation: The two key features of irreversible injury are:

Inability to reverse mitochondrial dysfunction and
Development of profound disturbances in the membrane function