This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Social and Language Milestones, Subject name: Pediatrics
[{'content': 'Significant variations in attainment of milestones in different developmental domains is called: \nSelect and explain. \nA. Delay, B. Dissociation, C. Dency, D. Disability', 'role': 'user'}, {'content': "Answer: B \nExplanation: Significant variations in attainment of milestones in different developmental domains is called 'Dissociation'. Dence- Acquisition of milestones in a sequence that is different from the usual Ex: Walking may come before crawling in cerebral palsy. Delay is when child does not reach their developmental milestones at the expected time. Developmental disabilitiesare a group of conditions due to an impairment in physical, learning, language, or behavior areas.", 'role': 'assistant'}]