This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Reversible Cell Injury, Subject name: Pathology
A scientist Dr. Gobind was asked to paicipate in a research project on myocardial infarctions in a rabbit model. Which of the following occurs in ischemic cell injury? 
Select and explain. 
A. Efflux of K+ and Na+, B. Influx of K+ and Ca++, C. Influx of K+ and H 2O, D. Influx of Na+ and Ca++
D: Influx of Na+ and Ca++
Answer: D: Influx of Na+ and Ca++ 
Explanation: Ischemia leads to less ATP formation and therefore increased entry of sodium and calcium ions inside the cell.