Which of the following is NOT one of the three protection methods for radiation exposure?

The correct choice is the method not associated with the three primary protection strategies against radiation exposure, which are distance, time, and shielding.

Distance refers to the practice of maximizing the space between the radiation source and the individual. This method is effective because radiation intensity decreases with increasing distance from the source, making it a fundamental strategy in radiation safety.

Time involves minimizing the duration of exposure to radiation. The less time one spends near a radiation source, the lower the total dose received, thus reducing the risk of potential harm.

Shielding is the use of materials that can absorb or deflect radiation, thereby reducing exposure. Common shielding materials include lead, concrete, and water, appropriately chosen based on the type of radiation being dealt with.

While inspection is an essential practice in ensuring radiation safety protocols are followed and conditions are assessed, it is not classified as a protective method in the context of exposure reduction strategies. Therefore, identifying inspection as not being one of the three core methods reinforces the understanding of effective radiation protection principles.