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: Pharmacology
[{'content': 'Remission with SSRI or TCA patient again havingrelapse. There may be deficiency of ? \nSelect and explain. \nA. Pyridoxine, B. Cobalamine, C. Ascorbate, D. Retinol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is `b\' i.e., Cobalamine Subjects with vitamin B 12deficiency and depression may present with history of past episodes with spontaneous remission or response to treatment with antidepressants and later recognition or development Budeficiency" Studies have found that some people with depression may have low levels of folic acid, vitamin B12 or vitamin D.', 'role': 'assistant'}]