Who is lawful to possess and carry drugs?

The correct answer highlights that doctors and dentists are lawful to possess and carry drugs due to their professional responsibilities and the legal authority granted to them. Medical practitioners require access to various controlled substances to treat patients effectively, whether it involves prescribing medication or using drugs in a clinical setting. Their training and licensing ensure that they can handle these substances safely and appropriately, abiding by legal regulations regarding their use.

While police officers may possess and carry drugs as part of their duties, particularly for enforcement and evidence collection, they are not the only group authorized to do so under the law. Having a prescription does provide legal authority for an individual to possess and carry drugs, but this usually pertains to the person to whom the prescription is issued rather than being a blanket statement for all adults. Thus, the scenario is not as simple as stating "any adult with a prescription" is lawful, as it must be specific to the individual named on the prescription.

Overall, the role of doctors and dentists emphasizes the medical context in which drug possession and use occur, highlighting the regulations in place for health professionals that ensure public safety and adherence to legal standards.