This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Pharmacology), Subject name: Pharmacology
[{'content': 'A standard normal distribution has \nSelect and explain. \nA. A mean of 1 and a standard deviation of 1, B. A mean of 0 and a standard deviation of 1, C. A mean larger than its standard deviation, D. All scores within one standard deviation of the mean', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (B) A mean of 0 and a standard deviation of 1# STANDARD NORMAL DISTRIBUTION is defined as a normal distribution with a mean of 0 & a standard deviation of 1.> Normal (or Gaussian) distribution is a very commonly occurring continuous probability distribution--a function that tells the probability that any real observation will fall between any two real limits or real numbers, as the curve approaches zero on either side.> The figure below shows 99.7% of population fall within 2 SD.', 'role': 'assistant'}]