The correct answer is Ionization and Photoelectric.
These are the two primary types of smoke detection technologies:
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Ionization Smoke Detectors: These detectors utilize radioactive material to ionize air in a sensing chamber, allowing them to detect rapid flames and small particles produced by fast-burning fires.
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Photoelectric Smoke Detectors: These detectors use a light source and a sensor. When smoke enters the sensing chamber, it scatters the light beam, which alerts the detector to the presence of smoke, making it more responsive to smoldering, slow-burning fires.
So, the correct choice from your options would be None of the above, if you are strictly considering the precise terms of "Ionization and Photoelectric."