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: Anaesthesia
Which of the following local anaesthetic is safer in surface and infiltrating anaesthesia? 
Select and explain. 
A. Procaine, B. Cocaine, C. Lignocaine, D. Amethocaine
C: Lignocaine
Answer: C: Lignocaine 
Explanation: Lignocaine and prilocaine are considered as safe local anaesthetic and can be used for both topical and infiltration (local nerve blocks) anaesthesia.