The correct option is D steel
In order for Anuradha to make her noodles cool faster, she need to put them on a plate made of a good conductor of heat. In this way, the heat from the noodles will be absorbed by the plate faster, there by making them cool quicker.
Wood, plastic, and glass are bad conductors of heat, and cannot help Anuradha in accomplishing her task. Steel, on the other hand, is a good conductor of heat, and will cool the noodles down faster.