This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
[{'content': 'Developmental Quotient is calculated as: \nSelect and explain. \nA. Average age at attainment / observed age at attainment x100, B. Observed age at attainment / average at attainment x100, C. Observed age at attainment x average age at attainment, D. Observed age at attainment / average age at attainment', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Average age at attainment/observed age at attainment x100Significant delays on screening is an indication for a detailed formal assessment of developmental status. By assessment, one can assign developmental quotient (DQ) for any developmental sphere. A DQ below 70 is taken as delay', 'role': 'assistant'}]