This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMT Q Bank, Subject name: Forensic Medicine
[{'content': 'One of the following plants is an ideal cattle poison: \nSelect and explain. \nA. Nerium odorum, B. Calotropis, C. Abrus precatorius, D. Cerebra thevetia', 'role': 'user'}, {'content': "Answer: C \nExplanation: Abrus precatorius is commonly used as cattle poison in Indian villages. The toxic principle is injected into the animal in the form of fine needle-shaped structures called 'suis'. Seeds are also used as aboifacient and as arrow poison.", 'role': 'assistant'}]