Which lists the four types of ionizing radiation?

• A. Alpha, Beta, Visible Light, Sound
• B. Alpha, X-ray, Gamma, Protons
• C. Alpha, Beta, Gamma / X-ray, Neutron
• D. Alpha, Microwave, Neutron, Beta

Answer: (C)

Ionizing radiation includes forms that can remove electrons from atoms. The typical four categories you learn are alpha and beta particles (charged particle radiation) and gamma rays plus X-rays (high‑energy photons). Neutrons are also ionizing and are treated as a distinct type because they are neutral and interact with matter differently. So listing alpha, beta, gamma or X-ray, and neutron covers the main groups: charged particle radiation, high-energy photons, and a neutral particle that can cause ionization. The other options mix in non‑ionizing forms like visible light or sound, or pair items in a way that doesn’t align with how these radiations are categorized, which is why this choice is the best.