This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
[{'content': 'Neurotoxicity is seen with excess of \nSelect and explain. \nA. Vitamin B6, B. Vitamin B12, C. Vitamin B2, D. Vitamin C', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Neurotoxicity is seen with excess of Vit B6. Toxicity of pyridoxine: Pyridoxine is the only water-soluble vitamin with significant toxicity. Neurologic symptoms (sensory neuropathy) occur at intakes above 200 mg/day, an amount more than 100 times the RDA. Substantial improvement, but not complete recovery, occurs when the vitamin is discontinued. Reference: Lippincott Textbook of Biochemistry pg no. 378', 'role': 'assistant'}]