<prompt> A housewife ingests a rodenticide white powder accidentally. Her examination showed generalized flaccid paralysis and an irregular pulse. ECG shows multiple ventricular ectopics, generalized changes within ST-T. Serum potassium is 2.5 mEql. The most likely ingested poison is: AIIMS 06Barium carbonateSuperwarfarinsZinc phosphideAluminum phosphide  <response>: Ans. Barium carbonate 