This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'Age at which a child can tell gender? \nSelect and explain. \nA. 2 years, B. 3 years, C. 4 years, D. 5 years', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Milestones at 3 years of age( most of these have been asked in previous years)\n\nCan tell age gender and recall story\nRides tricycle\nStands momentarily on one foot\nMakes a tower of 10 cubes; imitates construction of “bridge” of 3 cubes\nCopies circle\nImitates cross\nPlays simple games (in “parallel” with other children)\nHelps in dressing (unbuttons clothing and puts on shoes)\nWashes hands', 'role': 'assistant'}]