<prompt> A 25 years old man presented to emergency ward with complaints of stiffness and twisting of his neck and jaw. He describes these symptoms as very uncomfortable and completely involuntary. His medication include lithium and trifluphenazine. Which of the following is the next immediate step in management?IV lorazepamBenztropine IMDiphenhydramineTrifluophenazine  <response>: Refer: Harrisons Principles of Internal medicine, 18th edition, pg no: 3544Refer: Kaplan Saddocks CTP 10th Ed Chap34.8 P7614Neurological side effects of antiparkinson agents 