A patient admitted due to repeated attacks of pancreatitis presents with dementia and loss of proprioception in the legs. What is the most appropriate treatment?

The key is C. Cobalamin. [Pancreatic insufficiency can lead to malabsorption and B12 (cobalamin) deficiency. Dementia and diminished vibratory sensation and proprioception in the lower extremities were the most common objective findings of cobalamin deficiency. The damage to the myelin due to cobalamin deficiency results in a condition known as subacute combined degeneration of the spinal cord (SCDSC). This condition affects various parts of the spinal cord, including the dorsal columns, the lateral corticospinal tracts, and the spinocerebellar tracts, resulting in a loss of proprioception, ataxia, the development of peripheral neuropathy, and dementia].