This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
The following tests are used to check the efiiciency of pasteurization of mild except - 
Select and explain. 
A. Phosphatase test, B. Standard plate count, C. Coliform count, D. Methylene blue reduction test
D: Methylene blue reduction test
Answer: D: Methylene blue reduction test 
Explanation: Methylene blue reduction test is an indirect method for detection of microorganism in milk. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 606