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': 'In a population of pregnant female, Hb is estimated on 100 women with standard deviation of 1gm%.The standard error is - \nSelect and explain. \nA. 1, B. 0.1, C. 0.01, D. 10', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]