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 cells do not divide at the same rate. Events in which phase of the cell cycle determine when a cell is going to replicate? 
Select and explain. 
A. M phase, B. G1 phase, C. S phase, D. G2 phase
B: G1 phase
Answer: B: G1 phase 
Explanation: None