Which one of the following is an isobar of ${}_6\mathrm{C}^{14}$

Isobar: The two nuclides of different elements which contain same atomic mass number (A) but deferent atomic numbers (Z) are called isobars.

Among the given species  ${}_{7}N^{14}$ is isobar with  ${}_6\mathrm{C}^{14}$