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
Find the value of range for the following data 7, 9, 6,8, 11, 10, 4 - 
Select and explain. 
A. 5, B. 6, C. 7, D. 8
C: 7
Answer: C: 7 
Explanation: None