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: Unknown
[{'content': 'Eutectic lignocaine-prilocaine has the following unique property \nSelect and explain. \nA. It causes motor blockade without sensory block, B. By surface application, it can anaesthetize unbroken skin, C. It is not absorbed after surface application, D. It has strong vasoconstrictor action', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lignocaine or prilocaine cannot anaesthetize intact skin.\nEutectic mixture is the combination of equal proportions of lignocaine and prilocaine at 25° C.\nThis mixture has a lower melting point than any of the two ingredients. It helps to make the preparation oily that can be applied on the intact skin.\nEutectic mixture can be used to anaesthetize intact skin.', 'role': 'assistant'}]