Which of the following pair of nuclides are Isobars?
1
\({ }_{1}^{2} \mathrm{H}, \ _{1}^{3} \mathrm{H}\)
2
\({ }_{1}^{3} \mathrm{H},{ }_{2}^{3} \mathrm{He}\)
3
\({ }_{80}^{198} \mathrm{Hg},{ }_{79}^{179} \mathrm{Au}\)
4
\({ }_{1}^{1} \mathrm{H}, \ { }_{1}^{3} \mathrm{H}\)