Why do we prefer a choke coil to a rheostat in controlling a.c ?

Question

$\begin{array}{1 1} \text{Large amount of heat energy is dissipated in a choke coil } \\ \text{No energy is dissipated in a choke coil } \\ \text{Less amount of energy is dissipated in a choke coil } \\ \text{None of the above }\end{array}$