<prompt> A patient on antipsychotic for past 4 weeks is brought to the emergency with complaint of acute onset of fever, excessive sweating confusion, rigidity of limbs and decreased communication. Examination reveals Temperature of 104degF; PR - 120min BP-150100 with disorientation. What is the most probable diagnosis:Lithium toxicityAggrevation of psychosisDystoniaNeurolept malignant syndrome  <response>: D i.e. Neuroleptic malignant syndrome 