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
Chemical constituent of cigarette lighter used for volatile substance abuse is 
Select and explain. 
A. Fluorocarbon, B. Butane, C. Acetone, D. Toluene
B: Butane
Answer: B: Butane 
Explanation: CIGARETTE LIGHTER - BUTANE Fluorocarbon - AEROSOLS Acetone - GLUES, DYES, NAIL POLISH REMOVER Toluene - ACRYLIC PAINTS