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: Unknown
Usual presentation of cauda equina syndrome is 
Select and explain. 
A. Sudden and unilateral, B. Gradual and bilateral, C. Sudden and bilateral, D. Gradual and unilateral
D: Gradual and unilateral
Answer: D: Gradual and unilateral 
Explanation: Conus medullaris syndrome is usually sudden and bilateral whereas cauda equina is grdual and unilateral.