Which of the following is NOT a basic chemical solution used to process black-and-white film?

The stabilizer is not considered a basic chemical solution used in the primary processing steps of black-and-white film. In the traditional black-and-white film development process, there are three essential chemicals: the developer, the stop bath, and the fixer.

The developer is responsible for converting the exposed silver halides in the film emulsion into metallic silver, which forms the image. The stop bath is used to halt the development process, typically by neutralizing the developer's activity, often using an acid solution. The fixer works to remove unexposed silver halides, thus making the image permanent and light-resistant.

While a stabilizer may be used in some photographic processes, particularly post-processing to preserve the film or prepare it for scanning, it does not play a fundamental role in the core development cycle for black-and-white film. Hence, it is categorized as not being one of the basic solutions involved in this specific photography procedure.