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: Dental
The most toxic form of mercury is 
Select and explain. 
A. Methyl and ethyl mercury, B. Mercury vapour, C. Inorganic mercury forms, D. Mercury sulphide
A: Methyl and ethyl mercury
Answer: A: Methyl and ethyl mercury 
Explanation: None