This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 3, Subject name: Forensic Medicine
Which of the following order is true about toxicity of mercury 
Select and explain. 
A. Organic salts > mercuric salts> mercurous salts, B. Mercuric salts> organic salts> mercurous salts, C. Mercuric salts > mercurous salts> organic salts, D. Mercurous salts > organic salts> mercuric salts
A: Organic salts > mercuric salts> mercurous salts
Answer: A: Organic salts > mercuric salts> mercurous salts 
Explanation: There are 3 forms of mercury :- 1. Organic - most toxic 2. Mercuric- intermediate 3. Mercurous -least toxic