The foreign exchange rate is given between the pairing of Canadian and British Pound is $CA\frac{D}{G}BP=0\mathrm{.}60042.$ In theory, what is the exchange rate of GBP$/$CAD$?$

a$.$ Insufficient data given to provide the answer.

b$.1\mathrm{.}57763$

c$.1\mathrm{.}66550$

d$.1\mathrm{.}60042$