Which of the following is true about pasteurization

Pasteurization Is a method for sterilization of milk. It is defined as the heating of every particle of milk or milk product to a specific temperature for a specific period of time without allowing recontamination of that milk or milk product. Two methods are commonly used.- Holder method → 63°c for 30 minutes. Flash method → 72°c for 15-20 seconds "Pasteurization kills nearly 90% of the bacteria in milk including the more heat resistant tubercle bacillus and the fever organisms. But it will not kill thermoduric bacteria nor the bacterial spores." - PSM Park 19th/e