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: Physiology
[{'content': 'During Flight or Fight reaction, which of the following is responsible for increase in local blood flow : \nSelect and explain. \nA. Sympathetic system mediated Cholinergic release, B. Local hormones, C. Para-sympathetic cholinergic, D. Endocrine factors only', 'role': 'user'}, {'content': "Answer: A \nExplanation: A i.e. Sympathetic mediated cholinergic releaseThe 'flight or fight' reaction is a sympathetic alarm reaction wherein a large poion of sympathetic nervous system discharged at the same timeQ, in response to a variety of stress.", 'role': 'assistant'}]