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
The classical tetrad of peripheral neuropathy, retinitis pigmentosa, cerebellar ataxia and elevated CSF protein is found in which hereditary neuropathy? 
Select and explain. 
A. Fabry disease, B. Refsum’s disease, C. Tangier’s disease, D. Adrenoleukodystrophy
B: Refsum’s disease
Answer: B: Refsum’s disease 
Explanation: Refsum’s disease is autosomal recessive inborn error of metabolism . It is due to accumulation of phytanic acid in blood and tissues. Classical features include retinitis pigmentosa, peripheral neuropathy, cerebellar ataxia, elevated protein in CSF without increases in the number of cells.