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: Pharmacology
[{'content': 'Which drug is likely to cause livedo reticularis? \nSelect and explain. \nA. Gabapentin, B. Amantadine, C. Pramipexole, D. Levodopa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. AmantadineAmantadine is antiviral agent used in parkinsonism. It increases the dopamine levels by inhibiting its reuptake and have anticholinergic effect. It causes discoloration of skin, livedo reticularis as side effect.', 'role': 'assistant'}]