The therapeutic ratio is considered larger than 1 when:

The therapeutic ratio is a measure of the effectiveness of a treatment in targeting the tumor compared to its effects on surrounding healthy tissue. When the therapeutic ratio is considered larger than 1, it indicates that the treatment is more effective in treating the tumor than in harming the normal surrounding tissues. A larger therapeutic ratio suggests that the tumor is sensitive to treatment, meaning that the therapeutic effects significantly outweigh the potential negative effects on healthy tissue.

In a scenario where the tumor is sensitive to treatment, a smaller dose can effectively kill or damage the cancer cells while minimizing harm to nearby normal cells. This balance is crucial in cancer treatment, as it helps in achieving a successful outcome with fewer side effects, thus improving the patient's quality of life.

The other options involve conditions that do not contribute positively to the therapeutic ratio. For example, if a tumor is resistant to treatment, it would imply the ratio is likely less than or equal to 1 because the treatment does not effectively control the tumor compared to its potential harms. Similarly, experiencing no side effects does not directly relate to the therapeutic ratio being greater than 1, as a treatment may still be ineffective for the tumor even if it causes no harm. Lastly, while tissue repair can be beneficial in treatment timelines, it does not