This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins, Subject name: Biochemistry
Coenzyme A formed from which vitamin - 
Select and explain. 
A. C, B. B4, C. Nicotinic acid, D. Pentothenic acid
D: Pentothenic acid
Answer: D: Pentothenic acid 
Explanation: Ans. is 'd' i.e., Pentothenic acid VitaminActive form (coenzymes)Reaction typeB1 (Thiamin)Thiamine pyrophosphate (TPP)Oxidative decarboxylation, TransketolationB2 (Riboflavin)FMN, FADOxidation / Reduction (Redox reaction)B3 (Niacin)NAD+, NADP+Oxidation / Reduction (Redox reaction)B6 (Pyridoxin)Pyridoxal phosphate (PLP)Transamination, deamination, decarboxylation, condensation, trans-sulfurationB12 (cobolamin)Methylcobalamin. deoxyadenosy Icoba lam inIsomerization of meihylmelonyl-CoA to succinyl-CoA, synthesis of methionine from homocysteineFolic acidTetrahydrofolate (THF)One carbon group transferBiotinBiocytinCarboxylationPantothenic acidPentothenate in Co A and ACPAcyl group transferVitamin KVitamin KCarboxylation of glutamic acid residue