What is the primary mode of action for beta radiation in the human body?

Beta radiation primarily consists of high-energy electrons or positrons emitted by certain radioactive materials. When beta particles interact with human tissue, they have sufficient energy to penetrate the skin and reach internal tissues, causing damage along their path.

The reason option B accurately reflects the mode of action of beta radiation is that beta particles can penetrate several millimeters into body tissue, potentially reaching internal organs and causing radiation damage to cells. This can lead to acute radiation effects or long-term health issues like cancer, depending on the exposure level and duration.

While other potential effects of beta radiation, such as causing superficial burns, are acknowledged, the key aspect that distinguishes the primary mode of action is its ability to penetrate deeper into tissues rather than being limited to superficial effects or exclusively affecting skin cells. The capacity to reach and damage internal tissue is critical in understanding the health risks associated with exposure to beta radiation.