<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An 8-year-old boy is brought to the emergency department by his parents 30 minutes after losing consciousness. He was at a water park with his family when he fell to the ground and started to have jerking movements of the arms and legs. On arrival, he continues to have generalized, violent muscle contractions and is unresponsive to verbal and painful stimuli. The emergency department physician administers lorazepam. The expected beneficial effect of this drug is most likely caused by which of the following mechanisms?? A: Increased affinity of GABA receptors to GABAB, B: Allosteric activation of GABAA receptors, C: Increased duration of chloride channel opening, D: Inhibition of GABA transaminase, E: Noncompetitive NMDA receptor antagonism,  <response>: This is a clinical vignette describing a pediatric patient with generalized tonic-clonic seizures who was given lorazepam in the emergency department. The question is asking about the mechanism of action of lorazepam in stopping the seizure activity.Lorazepam is a benzodiazepine that enhances the effect of the inhibitory neurotransmitter GABA at the GABAA receptor. Benzodiazepines like lorazepam bind to an allosteric site on the GABAA receptor and increase the frequency of chloride channel opening, resulting in neuronal hyperpolarization and inhibition of brain activity. So the correct answer should be the one that describes this allosteric activation of GABAA receptors by lorazepam.B: Allosteric activation of GABAA receptors 