Alabama Barber Practice Exam

The other options listed as choices are incorrect because they do not meet the requirement for a dry sanitizer to be effective. Hydrogen peroxide solution, while it can act as a sanitizer, is typically used in liquid form and not in a dry form. 60% grain alcohol is also not a commonly used ingredient in dry sanitizers and is mainly used in liquid hand sanitizers. Disinfectant solutions typically contain water and are not considered dry. Formaldehyde fumes are often used as a dry sanitizer as they can effectively kill bacteria and viruses on surfaces. Therefore, it is the most suitable answer for an effective dry sanitizer.