5. Which of the following sentences is incorrect?
a. Cleaning and sanitizing must be part of the standard operating procedures.
b. Heat, Chemicals and Radiation are the most commonly used sanitizing method.
c. The best water temperature for chemical sanitizers is between 55°F (130°C) and 120°F (49°C).
d. The approved chemical sanitizers are chlorine, iodine and quaternary ammonium compounds.​