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
Tyndallization involves steaming at 
Select and explain. 
A. 100°C for 20 min for 3 consecutive days, B. 121°C for 15 min for 3 consecutive days, C. 126°C for 2 mins for 3 consecutive days, D. < 100°C for 20 mins
A: 100°C for 20 min for 3 consecutive days
Answer: A: 100°C for 20 min for 3 consecutive days 
Explanation: Tyndallization involves steaming at 100°C for 20 minutes for 3 consecutive days.
Used for sterilization of gelatin and egg serum or sugar contaning media.