Which equation is equivalent to the equation $b \sin (A)=a \sin (B)$ ?

A$\frac{\sin (B)}{a}=\frac{\sin (A)}{b}$

B$\frac{\sin (A)}{\sin (B)}=\frac{b}{a}$

C$\frac{\sin (A)}{a}=\frac{\sin (B)}{b}$