This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
[{'content': 'A child is below the third percentile for height. His growth velocity is normal, but chronologic age is more then skeletal age. The most likely diagnosis is _________ \nSelect and explain. \nA. Constitutional delay in growth, B. Genetic sho stature, C. Primordial dwarfism, D. Hypopituitarism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Constitutional delay of growth and pubey (CDGP) is a term describing a temporary delay in the skeletalgrowth and thus height of a child with no physical abnormalities causing the delay. Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]