This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Motor Milestones, Subject name: Pediatrics
[{'content': 'A baby can follow an object till 180o, can hold neck, can sit with suppo but cannot sit without suppo. The age of the baby is: \nSelect and explain. \nA. 1 month, B. 2 months, C. 4 months, D. 6 months', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Following an object up to 180deg comes at 2 months, Neck holding comes at 3 months, Sitting with suppo is attained at 6 months; So, the age of this baby is 6 months', 'role': 'assistant'}]