This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
In normal distribution curve, which have same value- 
Select and explain. 
A. SD and mean, B. SD and Mode, C. Mode and Mean, D. SD and Median
C: Mode and Mean
Answer: C: Mode and Mean 
Explanation: Ref: Parks 23rd edition pg 849. The standard normal curve is a smooth, bell-shaped curve, perfectly symmetrical curve based on an infinitely large number of observations. Total area of the curve is 1. Mean=0 Standard detion is 1 . The mean, median and mode all coincide.