Which of the statement is true <br> (A) An AC can be changed to DC when required <br> (B) In India the frequency of AC is 60 Hertz <br> (C) The power wastage in AC transmission is high when compared to DC <br> (D) In an AC the direction is changed after a fixed interval

Question

$\begin{array}{1 1} (a)\; \text{A and C} \\ (b)\; \text{B and C} \\ (c)\; \text{A and D} \\ (d)\; \text{B and D } \end{array}$