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
Among a 100 women with average Hb of 10 gm%, the standard deviation was 1, what is the standard error? 
Select and explain. 
A. 0.01, B. 0.1, C. 1, D. 10
B: 0.1
Answer: B: 0.1 
Explanation: In the given question, n = 100 women, mean Hemoglobin (m) = 10 gm%, standard deviation (s) = 1,
Thus standard error (SE) =