This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 1, Subject name: Forensic Medicine
In which of the following poisons, injuries are not present at the poal of entry but with considerable systemic involvement during autopsy? 
Select and explain. 
A. Corrosives, B. Chlorine, C. Nitrobenzene, D. Sulphur dioxide
C: Nitrobenzene
Answer: C: Nitrobenzene 
Explanation: Poisons producing systemic lesions without injury at the poal of entry: Acute haemolytic poisons (Arsine, Nitrobenzene) Poisons producing leisons at poal of entry without systemic injuries: corrosives, chlorine, sulphur dioxide. Poisons producing both local and systemic injuries heavy metals