This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Motor Milestones, Subject name: Pediatrics
A child can make a bridge with blocks at:- 
Select and explain. 
A. 2 years, B. 18 months, C. 4 years, D. 5 years
C: 4 years
Answer: C: 4 years 
Explanation: 4 years - Bridge with blocks 5 years - Gate with blocks