A sample of iridium has a relative atomic mass of $192.29$. Only two isotopes are present in the sample. $64.50\%$ of the sample is $^{193}\text{Ir}$. Which other isotope is present in the sample?
- A$^{189}\text{Ir}$
- B$^{190}\text{Ir}$
- C$^{191}\text{Ir}$
- D$^{192}\text{Ir}$