Which of the following is not a coenzyme?
a)	NAD	b)	NADP	c)	FAD	d)	ATP

(d)

Coenzymes are loosely attached non-protein low molecular weight thermostable organic groups, which readily separate from the apoenzyme,  NAD (Nicotinamide Adenine Dinucleotide), NADP (Nicotinamide Adenine Dinucleotide Phosphate), FAD, FMN, Co-A, TPP (Thiamine Pyrophosphate), lipoic acid, etc. ATP (Adenosine Triphosphate) is the common energy currency of all cells.