This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Measures of Central Tendency and Distribution, Subject name: Social & Preventive Medicine
Frequently occurring value in a series is known as 
Select and explain. 
A. Average, B. Median, C. Mean, D. Mode
D: Mode
Answer: D: Mode 
Explanation: Ans. (d) ModeRef : K. Park 23rd ed. / 847-88THE MODE* The mode is the commonly occurring value in a distribution of data. It is the most frequent item or the most fashiionable" value in a series of observations. For example, the diastolic blood pressure of 20 individuals was:85, 75 79, 71, 95, 75, 75, 77, 75, 9071, 75, 79, 95, 75, 77, 84, 75, 81, 75* The mode or the most frequently occurring value is 75.