Which of the following is classified as a Group B occupancy?

Group B occupancy classifications are designated for buildings that are used for various business purposes. These include offices, banks, post offices, and outpatient clinics among others. Each of the options listed – bank, post office, and clinic, outpatient – fits neatly into this classification as they all involve spaces for administrative activities, service provision, or professional services.

A bank primarily serves financial transactions; a post office handles mail and communication services; and an outpatient clinic provides medical services without overnight accommodation. Since all three options represent typical functions associated with Group B occupancy, the correct answer encompasses all of these types. This classification helps inspectors and builders adhere to appropriate safety and building codes that cater to the specific needs of such facilities.