This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
Eutectic lignocaine-prilocaine has the following unique propey? 
Select and explain. 
A. 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
B: By surface application, it can anaesthetize unbroken skin
Answer: B: By surface application, it can anaesthetize unbroken skin 
Explanation: Lignocaine or prilocaine cannot anaesthetize intact skin.The eutectic mixture is the combination of equal propoions of lignocaine and prilocaine at 25deg C.This 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.The eutectic mixture can be used to anaesthetize intact skin.