Repeated exposures of low doses of radiation may affect the functional efficiency of an organ and its defense against infections and repair ability

• A. Only cause cancer
• B. Functional efficiency and defense against infections and repair
• C. Immediate organ failure
• D. No effect

Answer: (B)

Repeated low-dose radiation can accumulate damage over time, so its impact goes beyond a single event or cancer risk. The key idea is that sublethal hits build up in tissues, slowing their ability to work properly and weakening the body's defenses and repair processes. Cells may suffer DNA damage, oxidative stress, and subtle functional changes that aren’t immediately lethal but reduce how well an organ performs and how effectively it fights infections or fixes damage. Immune cells and tissues with rapid turnover can be especially affected, leading to a higher risk of infection and slower recovery when damage occurs. That’s why this statement is best: it recognizes the cumulative effect on both organ function and the body’s capacity to defend and repair, rather than claiming only cancer risk, immediate failure, or no effect.