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
In the WHO recommended EPI Cluster sampling for assessing primary immunization coverage, the age group of children to be surveyed is- 
Select and explain. 
A. 0-12 months, B. 6-12 months, C. 9-12 months, D. 12-23 months
D: 12-23 months
Answer: D: 12-23 months 
Explanation: None