Let $\mathrm{A}=\left\{\mathrm{x},\mathrm{y},\mathrm{z}\right\}, \mathrm{B}=\left\{\mathrm{u},\mathrm{v},\mathrm{w}\right\} \mathrm{and} \mathrm{f}:\mathrm{A}\to \mathrm{B}$ be defined by f(x)=u, f(y)=v, f(z) = w. Then f is 

• A

  surjective but not injective

• B

  injective but not surjective

• C

  bijective 

• D

  None of the above