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: Pharmacology
[{'content': "Local anaesthetic injected directly into the tissue ? \nSelect and explain. \nA. Infiltration anaesthesia, B. Nerve block, C. Field block, D. Bier's block", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Infiltration anaesthesia o Infiltration anaesthesia is the injection of local anaesthetic directly into tissue without taking into consideration the course of cutaneous nerve.", 'role': 'assistant'}]