{"knowledge_schema": {"broad_category": "Science \u2192 Radioactivity \u2192 Isotope Decay", "refinement": "This problem pertains to the understanding of radioactive decay and the probability associated with it.", "specific_scope": "The focus is on a specific radioactive isotope with a defined decay probability, which is given as 25%.", "goal": "Identify the correct decay probability from the provided options."}, "summary": "This problem involves the concept of radioactive decay, specifically focusing on a radioactive isotope with a decay probability of 25%. The task is to recognize and select the correct decay probability from a list of candidates. Understanding the nature of decay probabilities is essential for solving such problems in the context of radioactivity."}