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B
TPP
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C
NAD
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D
FMN/FAD
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Solution
The correct option is D FMN/FAD Cofactor is a non protein part of the enzyme. It can be metal ions or the organic chemical. The cofactors which are organic chemicals are known as coenzyme. These are loosely attached to the apoenzyme. Vitamins acts as a coenzyme and activates the protein part of enzyme. Vitamin B2 complex like flavin acts as a prosthetic group (FMN) of the protein. FAD gets reduced to FADH2 by addition of hydrogen ion and two electron. The FADH2 helps in redox reaction during metabolic process. In electron transport chain, FADH2 breaks to form FAD+ and releases two electron which passes to electron carriers. FMN also acts as a prosthetic group and a strong oxidizing agent.