A handicapped accessible lavatory shall have ________ by _________ inches clear floor space minimum.

The correct size for clear floor space minimum for a handicapped accessible lavatory is specified as 30 inches by 48 inches. This dimension is important because it ensures that individuals with disabilities have enough maneuverability and space to use the lavatory comfortably and safely. The 30-inch width allows for side accessibility, while the 48-inch depth accommodates a forward approach, which is necessary for wheelchair users or others who may need extra space to navigate around the sink.

Understanding these requirements helps ensure compliance with accessibility standards, thereby promoting inclusion and access for all individuals. The dimensions align with the Americans with Disabilities Act (ADA) guidelines, which aim to remove barriers in public facilities and ensures that those with mobility challenges can use lavatories without obstruction.

Other options fall short of providing the necessary space that ensures both comfort and accessibility for all users. Therefore, the selection of 30 inches by 48 inches is crucial in adhering to these outlined standards.