This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and postmortem changes, Subject name: Forensic Medicine
Sample of spinal cord is preserved in suspected poisoning with 
Select and explain. 
A. Arsenic, B. Strychnine, C. Alcohol, D. Oleander
B: Strychnine
Answer: B: Strychnine 
Explanation: Preservation of viscera: In ceain cases of poisoning, the following are preserved. (1) Hea: strychnine, digitalis, yellow oleander. (2) Brain: 100 gm. of cerebrum or cerebellum: alkaloids, organophosphorus compounds, opiates, CO, cyanide, strychnine, barbituratesanaesthetics and volatile organic poisons. (3) Spinal cord entire length: strychnine and gelsemium. (4) C.S.F.: alcohol. (5) Bile: It is best removed by puncturing the gall bladder in situ. Narcotic drugs, cocaine, methadone, glutathione, barbiturates and some tranquilisers. (6) Vitreous humour: alcohol, chloroform, cocaine, morphine, tricyclic antidepressants, etc. (7) Lung: one lung in gaseous poisons, hydrocyanic acid, alcohol, chloroform. Ref:- k s narayan reddy; pg num:-125