This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Liquid gold urine is seen with which poisoning 
Select and explain. 
A. Heavy metals, B. Barbiturates, C. Organophosphorous, D. Lead poisoning
B: Barbiturates
Answer: B: Barbiturates 
Explanation: color of urine in different poisoning carbolic acid-green Nitric acid - brown Barbiturates- liquid gold Ref: Dr Bhatia medical toxicology