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': 'The percentage of active principle "tetrahydrocannabinol" in Ganja \nSelect and explain. \nA. 1-5%, B. 5-10%, C. 15-25%, D. 30-40%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ganja: It is the resinous extract of leaves and bracts of the female plant. It is mixed with a little tobacco and is usually smoked in a pipe (chilam). It contains the active principle in a concentration of about 25%. The resin has a rusty green color and a characteristic odor. The resin contains over 60 structurally similar compounds called cannabinoids, of which delta-9-tetrahydrocannabinol (THC) is responsible for most of its psychoactive effects. Ref: Textbook of Forensic Medicine and Toxicology; 5th edition; Page no 513', 'role': 'assistant'}]