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: Forensic Medicine
Urine appears 'Liquid Gold' in which poisoning- 
Select and explain. 
A. Heavy metals, B. Barbiturates, C. Organophosphorus, D. Lead poisoning
B: Barbiturates
Answer: B: Barbiturates 
Explanation: Barbiturate poisoning presents with features of shock i.e. hemo-concentration and oliguria, therefore the urine is highly concentrated and deep yellow I think this could very well mean 'Liquid gold'.