This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Pasteurization is ____________ disinfection 
Select and explain. 
A. Precurrent, B. Concurrent, C. Preconcurrent, D. Terminal
A: Precurrent
Answer: A: Precurrent 
Explanation: Disinfection of milk by pasteurization, water by chlorine and handwashing may be cited as examples of precurrent infection. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 140