This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 2, Subject name: Forensic Medicine
[{'content': 'Aificial bruise is commonly seen in which of the following irritant poison \nSelect and explain. \nA. Strychnos nux vomica, B. Semicarpus anacardium, C. Abrus precatorius, D. Capsicum annum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Aificial bruise: 1. Cause: Juice of Semicarpus anacardium (marking nut tree), Calotropis or Plumbago rosea 2. Color: Dark brown 3. Shape: Irregular 4. Site: Exposed accessible pas 5. Margins: Well-defined and regular, covered with small vesicles 6. Redness and inflammation: Seen in surrounding skin 7. Itching: Present 8. Vesicles: May be found on fingeips due to scratching 9. Contents: Acrid serum 10. Chemical tests: Positive for the chemical', 'role': 'assistant'}]