In the context of doorbells, which of the following is NOT one of the types mentioned?

In the context of doorbells, a pull bell is not commonly recognized as one of the standard types of doorbell systems. Traditional doorbells typically include buzzers, which produce an audible signal when activated, chimes, which provide a melodic sound when someone presses the doorbell button, and ringers, which can indicate a more mechanical or older style of doorbell system. The pull bell concept might refer to an older system where pulling a cord could ring a bell, but this is not a standard classification in modern doorbell terminology. Therefore, identifying the pull bell as an option that does not fit within the established types found in current home inspection standards makes it the correct choice in this context.