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 is below the third percentile for height. His growth velocity is normal, but chronologic age is more than skeletal age. The most likely diagnosis is - 
Select and explain. 
A. Constitutional delay in growth, B. Genetic sho stature, C. Primordial dwarfism, D. Hypopituitarism
A: Constitutional delay in growth
Answer: A: Constitutional delay in growth 
Explanation: Ans. is 'a' i.e., Constitutional delay in growth o The child in this question has : Height below 3rd percentile, i.e., sho stature. Normal growth velocity, i.e., normal variant of sho stature. Skeletal age is less than chronological age. o There are two types of normal variant of sho stature. Constituional delay in growth Familial genetic sho stature o In constitutional delay the bone age is less than chronological age, while in familial sho stature bone age is normal for the chronological age. o So, the most likely diagnois of this child is constitutional delay in growth.