<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 42-year-old man is brought in to the emergency department by his daughter. She reports that her father drank heavily for the last 16 years, but he stopped 4 days ago after he decided to quit drinking on his birthday. She also reports that he has been talking about seeing cats running in his room since this morning, although there were no cats. There is no history of any known medical problems or any other substance use. On physical examination, his temperature is 38.4oC 101.2oF, heart rate is 116min, blood pressure is 16094 mm Hg, and respiratory rate is 22min. He is severely agitated and is not oriented to his name, time, or place. On physical examination, profuse perspiration and tremors are present. Which of the following best describes the pathophysiologic mechanism underlying his condition?? A: Functional increase in GABA, B: Increased activity of NMDA receptors, C: Increased influx of chloride ions, D: Increased inhibition of norepinephrine, E: Increased inhibition of glutamate,  <response>: This is a question about alcohol withdrawal syndrome. The key details in the stem are that the patient is a 42-year-old man with a history of heavy alcohol use for 16 years who stopped drinking 4 days ago. He is now experiencing hallucinations, agitation, disorientation, tremors, and autonomic instability. The question asks about the pathophysiologic mechanism underlying his condition. Based on the history and symptoms, this is a clear presentation of alcohol withdrawal syndrome. The main pathophysiologic mechanism is increased excitatory neurotransmission, particularly through NMDA receptors, due to abrupt cessation of alcohol which enhances GABAergic inhibition and inhibits glutamatergic excitation.So the correct answer should be the one mentioning increased NMDA receptor activity.B: Increased activity of NMDA receptors 