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
Least toxic compound of lead is : 
Select and explain. 
A. Least toxic compound of lead is :, B. Lead oxide, C. Lead carbonate, D. Lead sulphide
D: Lead sulphide
Answer: D: Lead sulphide 
Explanation: D i.e. Lead sulphide