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
9 families surveyed have 1, 2,2, 2,3,4, 4, 6, 7 children respectively. The mean, median, mode respectively are - 
Select and explain. 
A. 3.4., 2, 3, B. 3,2,3, C. 3,3,3, D. 3.4,3,2
D: 3.4,3,2
Answer: D: 3.4,3,2 
Explanation: None