The Phosphoric Acid Salt of Caffeine Has the Structure $\mathrm { H } _ { 3 }$

The phosphoric acid salt of caffeine has the structure: This molecule behaves as an acid in that it can donate a hydrogen ion,created from the hydrogen atom bonded to the positively charged nitrogen atom.What salt is formed when 1 mole of this salt reacts with 1 mole of sodium hydroxide,NaOH,a strong base?

A) Salts can't react to form salts,rather they only arise from the reaction of an acid and a base.
B) $\mathrm { H } _ { 3 }$ $\mathrm { O } ^ { + }$ $\mathrm { H } _ { 2 }$ P $\mathrm { O } _ { 4 }$ ^-
C) $\mathrm { Na } ^ { 2 + }$ HP $\mathrm { O } _ { 4 }$ $\text { 2- }$
D) $\mathrm { Na } ^ { + }$ $$\mathrm { H } _ { 2 }$$ P $$\mathrm { O } _ { 4 }$$ $-$