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 child's growth variation is normal but bone development is not acc to the chronological age. What is diagnosis ? 
Select and explain. 
A. Genetic, B. Dwarfism, C. Constitutional delay, D. Familial sho stature
C: Constitutional delay
Answer: C: Constitutional delay 
Explanation: Ans. is 'c' i.e., Constitutional delay