This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
[{'content': 'Which of the following substances is commonly used by washerman to put marks on clothes - \nSelect and explain. \nA. Calotropis procera, B. Plumbago rosea, C. Semecarpus anacardium, D. Croton tigluiurns', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Marking Nut Botanical name: Semicarpus anacardium Common name: Marking nut, bhilawa, biba Medicolegal Impoance 1. Accidental poisoning -- quack medicine 2. Juice is applied to external genitalia of female as punishment for infidelity 3. Used to fabricate bruise/wound 4. Juice is thrown over other person to cause harm/injury 5. Juice is applied to cervical os to procure criminal aboion 6. Skin lesion produced by marking nut may be confused with contusion. REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO317', 'role': 'assistant'}]