Which of the following statements is not correct? <br> 1) In a domestic electric circuits the live wire usually has red insulation <br> 2) The neutral wire has black insulation <br> 3) The earth wire has green insulation

Question

$\begin{array}{1 1} (a)\; \text{1 and 2} \\ (b)\; \text{2 and 3} \\ (c)\; \text{1 and 3} \\ (d)\; \text{all the above} \end{array}$