This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'True for Babinski sign is? \nSelect and explain. \nA. Present in LMA lesion, B. Is a sign of extrapyramidal diseases, C. Classic response is plantar flexion of great toe, D. Normal in children upto 2 years', 'role': 'user'}, {'content': 'Answer: D \nExplanation: * *Seen in UMN lesion,normal response is flexible of great toe with flexible of the other toes. Normal in children up to 2yrs later disappears. Ref Harrison20th edition pg 2234', 'role': 'assistant'}]