This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
The smoky stool is seen in which poisoning? 
Select and explain. 
A. Phosphorus, B. Arsenic, C. Lead, D. Zinc
A: Phosphorus
Answer: A: Phosphorus 
Explanation: Ans. is 'A' i.e., Phosphorus Acute poisoning of phosphorus* Breath smells of garlic.* Vomitus and stools may be luminous in the dark.* Smoky stool syndrome Faint fumes may emanate from the stools.* Manifestations of liver damage - tender hepatomegaly, jaundice which may progress to an olive green hue, flapping tremor of hands (asterixis), mousy odour to the breath (foetor hepaticus).