Tyndallisation is a type of-: (A) Intermittent sterilization, (B) Pateurisation, (C) Boiling, (D) Autoclaving
Answer is A. A single exposure of 90 minutes usually ensures sterilisation but for media containing sugars or gelatin an exposure of 100 degree celsius for 20 minutes on 3 successive days is used . This is known as tyndallisation or intermittent sterilisation REF:Ananthanarayan and Panicker's Textbook of Microbiology 8th Edition pg no:32