This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Pathology
[{'content': 'Which among the following ions is impoant in irreversible cell injury? \nSelect and explain. \nA. Calcium, B. Sodium, C. Potassium, D. Chloride', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Irreversible cell injury damages the plasma membrane, which then fails to maintain the energy dependent Calcium pumps, allowing theinflux of calciuminto the cell.', 'role': 'assistant'}]