Question: What is the name and site of the typical lesion in the spinal cord caused by vitamin B12 deficiency? Subacute combined degeneration (SCD) in the transverse columns Subacute combined degeneration (SCD) in the ventral columns Subacute combined degeneration (SCD) in the olivary nuclei Subacute combined degeneration (SCD) in the dorsal columns Subacute combined degeneration (SCD) in the anterior gray horns