$\begin{array}{1 1} \text{a. Round bottomed flask, thermometer, water condenser and beaker} \\ \text{
b. Round bottomed flask, thermometer, air condenser and beaker} \\ \text{
c. Round bottomed flask, thermometer, fractionating column, water condenser and flask} \\ \text{
d. Round bottomed flask, thermometer, fractionating column, air condenser and flask}
\end{array} $
