In the context of Gibbs free energy and cellular metabolism, which molecule is adenosine triphosphate (ATP)?

• A. $Adenosine-P\sim P$ (adenosine diphosphate, ADP)
• B. $Adenosine-P\sim P\sim P$ (adenosine with three phosphate groups)
• C. $NAD{+}^{\mathrm{}}$ (nicotinamide adenine dinucleotide)
• D. $Adenosine-P$ (adenosine monophosphate, AMP)

Answer: (B)