Select the most appropriate word for the given group of words.

An entrance hall in a building used by the public, especially a hotel or theatre

foyer

The most appropriate word for an entrance hall in a building used by the public, especially a hotel or theatre is foyer.

• Gallery refers to a long, narrow room or hall, typically with a number of paintings or other works of art on display.
• Aisle refers to a long, narrow passage between rows of seats, especially in a church, theater, or other public building.
• Foyer refers to a large, open area just inside the entrance of a public building, such as a theater or a hotel, where people can wait and meet each other.
• Portico refers to a covered entranceway, typically with a roof supported by columns.

Foyer is the most appropriate word for this group of words because it specifically refers to an entrance hall in a public building. The other words do not have the same connotation of public access.