The correct option is C Allow light to pass through them.
We know that transparent objects allow the light to pass through them. These objects have the property to transmit all the light rays without reflecting and absorbing. Objects are classified into three types, based on the ability of light to pass through them. They are:
Transparent: Objects that allow light to pass through them are called transparent objects.
Eg: Glass, water, air etc.
Translucent: Objects that can transmit only a part of light through them are called translucent objects.
Eg: Frosted glass, greased paper, wax etc.
Opaque: Objects that do not allow light to pass through them are called opaque objects. Eg: Chair, desk, book ,wood