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 able to build a tower of 5 cubes . His developmental age is ______ \nSelect and explain. \nA. 12 months, B. 15 months, C. 18 months, D. 24 months', 'role': 'user'}, {'content': 'Answer: C \nExplanation: By 18 months the child is able to scribble and make a tower of 3 blocks and by 2 yrs he is able to make tower of 6 months Mnemonic 2 yr is 24 months during which child makes tower of 2 +4 blocks that is 6 blocks 3 yr is 36 months during which child makes tower of 3 + 6 blocks that is 9 blocks Ref : OP GHAI - ESSENTIAL PEDIATRICS - 8 TH edition page no 50', 'role': 'assistant'}]