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
[{'content': 'Involution forms are seen in \nSelect and explain. \nA. Lag phise, B. Log phase, C. Stationary phase, D. Phase of decline', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Involution forms - phase of decline.\nSporulation - stationary phase.', 'role': 'assistant'}]