This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drug Abuse, Subject name: Forensic Medicine
Cotton fever is due to the abuse of: 
Select and explain. 
A. Amphetamine, B. Heroin, C. Phencylidine, D. Cocaine
B: Heroin
Answer: B: Heroin 
Explanation: COTTON FEVER : Fever developing due to injection of a water extract of the cotton remaining after the heroin supply is used in a "bag"