This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
[{'content': 'Area of tongue (Arrow) shown in the illustration is the zone for what taste: \nSelect and explain. \nA. Sweet, B. Salt, C. Sour, D. Bitter', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. SaltThe area of distribution of taste sensation is as shown in the following illustration:', 'role': 'assistant'}]