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: Medicine
Conduction velocity of nerve is reduced in all of the following conditions, except - 
Select and explain. 
A. Acute Motor Axonal Neuropathy (AMAN), B. Acute Inflammatroy Demyelinating Neuropathy (AIDP), C. Hereditary Sencory Motor Neuropathy (HSM), D. Multifocal Motor Neuropathy
A: Acute Motor Axonal Neuropathy (AMAN)
Answer: A: Acute Motor Axonal Neuropathy (AMAN) 
Explanation: None