The relative percentage abundance of ${}_1{}^1\mathrm{H},{}_{ 1}{}^2\mathrm{H} \mathrm{and} {}_1{}^3\mathrm{H}$, respectively is

• A

  99.985, 0.0156, ${10}^{-15}$

• B

  ${10}^{-15}$, 99.985, 0.0156

• C

  0.0156,${10}^{-15}$, 99.985 

• D

  99.985, ${10}^{-15}$, 0.0156