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: Pediatrics
A 5 year lod child is assessed to have developmental age of one year. His developmental patient would be 
Select and explain. 
A. 100, B. 80, C. 20, D. 60
C: 20
Answer: C: 20 
Explanation: None