If r_f and r_d are the interest rates of a foreign country and domestic country, respectively and if $${S_{\frac{F}{D}}}$$ and $${S_{\frac{F}{D}}}$$ are spot exchange rate and forward exchange rate between the countries F and D, the interest rate parity is indicated by

A. $$\frac{{\left( {1 + {r_d}} \right)}}{{\left( {1 + {r_f}} \right)}} = \frac{{\frac{{{f_F}}}{D}}}{{\frac{{{S_F}}}{D}}}$$

B. $$\frac{{\left( {1 + {r_f}} \right)}}{{\left( {1 + {r_d}} \right)}} = \frac{{\frac{{{S_F}}}{D}}}{{\frac{{{f_F}}}{D}}}$$

C. $$\frac{{\left( {1 + {r_f}} \right)}}{{\left( {1 + {r_d}} \right)}} = \frac{{\frac{{{f_F}}}{D}}}{{\frac{{{S_F}}}{D}}}$$

D. None of these

Answer: Option C