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
Which poisoning is also known as st Anthony fire? 
Select and explain. 
A. Heroin poisoning, B. Ergot poisoning, C. Mushroom poisoning, D. Dhatura poisoning
B: Ergot poisoning
Answer: B: Ergot poisoning 
Explanation: Ergotism is an intensely painful barning sensation in the limbs and extremities caused by ergotamines from a fungus (claviceps paripurea) that can contaminate rye and wheat.