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
White vitriol is - 
Select and explain. 
A. Lead sulphate, B. Zinc phosphate, C. Copper sulphate, D. Zinc sulphate
D: Zinc sulphate
Answer: D: Zinc sulphate 
Explanation: Zinc sulphate:White vitriol * Colourless crystalline salt REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 311