This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Assessment of Growth, Subject name: Pediatrics
[{'content': 'At what age (in years) does-a child attain a height of 100 cms? \nSelect and explain. \nA. 2, B. 3, C. 4, D. 5', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) 4 yearsRef: OP Ghai 8th ed./13* Length of Indian baby at birth=50cm* Length at 1 year=75cm* Length at 4 1/2 years= 100cm* Subsequently 5-6 cm/year* Pubertal growth spurt=6-8cm/year', 'role': 'assistant'}]