This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': "Which of the following is not affected by a lesion in posterior column of spinal cord: \nSelect and explain. \nA. Romberg's sign, B. Temperature sense, C. Vibration sense, D. Ataxia", 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (Temperature sense): Temperature sense is a feature of the spinothalamic tract and not the posterior column. Vibration & Joint position sense are transmitted the posterior column. Altered joint position sense may lead to Ataxia and a positive Romberg's sign.", 'role': 'assistant'}]