The formula to convert Celsius scale to Fahrenheit scale is given by $F=1.8\;c+32$. Which of the following expressions refer to convert Fahrenheit to Celsius scale ?

Question

$\begin{array}{1 1} (a)\;c=\large\frac{F+32}{1.8} \\ (b)\;c=\large\frac{F-32}{1.8} \\ (c)\;c=(F+32)1.8 \\(d)\;(F-32)1.8 \end{array} $