Final answer:
For sterile storage areas, at least 4 air exchanges per hour are necessary; however, in the options provided, 5 is the nearest acceptable minimum for maintaining air quality and preventing contamination.
Step-by-step explanation:
The question refers to the standards for air exchanges in sterile storage areas, such as those required in medical facilities. The correct number of air exchanges per hour that should be maintained in sterile storage areas is at least 4. However, the options provided in the question do not include the number 4, and among the given choices, the closest correct figure would be 5 air exchanges per hour, which could be considered as an acceptable minimum if rounding to the nearest option provided. It is essential to follow professional guidelines and regulatory standards to ensure that sterile storage areas maintain air quality and prevent contamination.