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
True for Babinski sign is? 
Select and explain. 
A. 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
D: Normal in children upto 2 years
Answer: D: Normal in children upto 2 years 
Explanation: * *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