<prompt> A 40-year-old chronic alcoholic presented to the OPD with complaints of BL distal lower limb numbness and paresthesias along with weakness and dizziness. He has a history of stroke in the past. On examination, Characteristic skin lesions were observed Impaired vibration and proprioception Preserved pain and temperature Sensory ataxia Lab findings revealed a low EAST-AC value. Which of the following reactions uses the above deficient vitamin as coenzyme:-Transamination reactionsDecarboxylation reactionsDeamination reactionsAll of the above  <response>: This is a case of pyridoxine deficiency. 1st image shows the lesions of seborrheic dermatitis. 2nd image shows the cheilosis. Erythrocyte aspaate aminotransferase EAST and the EAST activation coefficient EAST-AC are long-term indicators of functional pyridoxine status due to the 120-day life span of erythrocytes. The active form of pyridoxine is PLP Pyridoxal phosphate. It is used as a coenzyme in reactions like: - Transamination Transsulfuration Decarboxylation Deamination 