The correct answer is option B. The ability of radiation to ionize gas particles.
The Geiger counter detects the nuclear radiations such as alpha, beta, gamma radiations ,etc. The geiger tube is filled with inert gases and high voltage is applied to the tube. Such that when the incident radiation ionizes the gas present inside, the radiation can be detected. Thus, the geiger counter works on the the ability of radiation to ionize gas particles.
