This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Which one of the following is the standard prescribed for setback (open space around the house) in rural areas" \nSelect and explain. \nA. Built up area 1/3 and open space 2/3, B. Built up area 2/5 and open space 3/5, C. Built up area 4 and open space \'A, D. Built up area \'A and open space 3/4', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Built up area 1/3 and open space 2/3", 'role': 'assistant'}]