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
All are true about subacute combined degeneration of spinal cord except - 
Select and explain. 
A. Due to deficiency of vitamin B12, B. Posterior column involvement, C. Corrticospinal involvement, D. Absent deep tendon reflexes
D: Absent deep tendon reflexes
Answer: D: Absent deep tendon reflexes 
Explanation: None