Identify the path of electricity from powerstations to our homes.

Question

$\begin{array}{1 1}\text{a. Power station Switch Yard Electricity grid Terminal stations homes} \\ \text{ b. Power station Electricity grid Terminal station Home} \\ \text{ c. Electricity grid Power station Terminal station Switch Yard Homes} \\ \text{ d. Power station Switch yard terminal station Electricity grid Home} \end{array}$