This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
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 mEq/l. The most likely ingested poison is: AIIMS 06 
Select and explain. 
A. Barium carbonate, B. Superwarfarins, C. Zinc phosphide, D. Aluminum phosphide
A: Barium carbonate
Answer: A: Barium carbonate 
Explanation: Ans. Barium carbonate