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
Which vitamin is necessary for coA synthesis 
Select and explain. 
A. Pantothenic acid, B. Ascorbic acid, C. Biotin, D. Pyridoxine
A: Pantothenic acid
Answer: A: Pantothenic acid 
Explanation: Synthesis of coenzyme A from pantothenate occurs in a series of  reactions. Pantothenate is  first phosphorylated to  which  cysteine is  added. Decarboxylation, followed by addition of AMP moiety and a phosphate (each from ATP) results in  coenzyme A. 
Ref : Satyanarayana, 3rd ed, pg- 148