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: Biochemistry
[{'content': 'Which vitamin is necessary for coA synthesis \nSelect and explain. \nA. Pantothenic acid, B. Ascorbic acid, C. Biotin, D. Pyridoxine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Synthesis of coenzyme A from pantothenate occurs in a series of\xa0 reactions. Pantothenate is\xa0 first phosphorylated to\xa0 which\xa0 cysteine is\xa0 added. Decarboxylation, followed by addition of AMP moiety and a phosphate (each from ATP) results in\xa0 coenzyme A.\xa0\nRef : Satyanarayana, 3rd ed, pg- 148', 'role': 'assistant'}]