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
The mean systolic blood pressure was measured in a sample population of elderly females and came out to be 125 mm Hg with a standard detion of 10. 95 percent of people would have blood pressure above: 
Select and explain. 
A. 105 mm Hg, B. 110 mm Hg, C. 115 mm Hg, D. 140 mm Hg
B: 110 mm Hg
Answer: B: 110 mm Hg 
Explanation: Ans: B. 110 mm Hg(Ref: Park 24/e p 886)