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: Microbiology
Sporulation occurs at 
Select and explain. 
A. Lag phase, B. Log phase, C. Stationary phase, D. Decline
C: Stationary phase
Answer: C: Stationary phase 
Explanation: Lag phase - maximum cell size.
Stationary phase - sporulation.