Chemical potential of a component 1 in a binary solution can be defined as

A. $$\left( {\frac{{\partial A}}{{\partial {n_1}}}} \right)T,V,{n_2}$$

B. $$\left( {\frac{{\partial U}}{{\partial {n_1}}}} \right)S,V,{n_2}$$

C. $$\left( {\frac{{\partial H}}{{\partial {n_1}}}} \right)S,V,{n_2}$$

D. $$\left( {\frac{{\partial G}}{{\partial {n_1}}}} \right)S,p,{n_2}$$

Answer: Option D