This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Air, Light, Sound, Housing, Radiation, Waste Disposal, Subject name: Social & Preventive Medicine
[{'content': 'In fetus, Deterministic effects due to radiation are less likely to occur below the dose of ? \nSelect and explain. \nA. 0.50 Gy, B. 5 Gy, C. 0.005 Gy, D. 0.50 rads', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Biological effects of radiation: As exposed dose increases, Threshold dose Effects Deterministic effects/ Non-stochastic effects Severity of effect increases Yes - For fetus - 0.50 Gy (50 rads) - Includes all harmful tissue reactions, excluding stochastic effects. Stochastic effects Frequency of occurrence increases No - Genetic influence, carcinogenesis', 'role': 'assistant'}]