What minimum height does a receptacle need to be installed at when serving a basin in a bathroom?

The correct choice reflects the National Electrical Code (NEC) guidelines for the installation of receptacles in bathrooms. When dealing with basins, receptacles must be installed at a height that ensures safety and accessibility without creating hazards.

Installing the receptacle at a minimum height of 36 inches from the outside edge provides a safer configuration that helps avoid potential water exposure, which can lead to electrical shock hazards. This height is above the typical level of water splashes and allows easy access while still being mindful of safety standards in wet environments.

Other options propose various heights or positions that could bring the receptacle too close to water, increasing the risk of electrical hazards. Therefore, the prescribed height serves the dual purpose of maintaining safety and ensuring the functionality of the installation.