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It's B. Haloperidol has been associated with torsades de pointes.

Explanation: ECG monitoring at baseline and during dose titration of medications that are of higher risk is indicated. Antipsychotic medications have been associated with prolongation of the QTc interval, torsades de pointes, and sudden death. Thioridazine has a “black box” warning of risk of QTc prolongation and sudden death. Haloperidol has been associated with torsades de pointes. Ziprasidone can result in QTc prolongation that is greater than with most other antipsychotic agents and concerns remain regarding possible serious cardiac events. The use of clozapine has been associated with the development of cardiomyopathy, myocarditis, and pericarditis.

Muskin PR, ed. Study Guide to Psychiatry: A Companion to the American Psychiatric Publishing Textbook of Psychiatry, Sixth Edition. Arlington, VA: American Psychiatric Association Publishing; 2015; 127, 457. Click here to purchase. Members can purchase at a discount.