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
In a population of pregnant female, Hb is estimated on 100 women with standard detion of lgm%. The standard error is - 
Select and explain. 
A. 1, B. 0.1, C. 0.01, D. 10
B: 0.1
Answer: B: 0.1 
Explanation: Ans. is 'b' i.e., 0.1