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
Chronic arsenic poisoning causes -a) Pure sensory neuropathyb) Pure motor neuropathyc) Mixed sensory and motor neuropathyd) Painful neuropathye) Hyperkeratosis of skin 
Select and explain. 
A. abd, B. acd, C. bde, D. cde
D: cde
Answer: D: cde 
Explanation: Arsenic causes mixed (sensory and motor) neuropathy and hyperkeratosis of palm and sole.
Neuropathy may cause painful paresthesia (i.e. painful neuropathy).