The correct option is D Transparent - Air
The objects which allow all the light to pass through them are called transparent objects, for example, air. Whereas, the opaque objects do not allow light to pass through them, for example, human body.
And, we know the Moon is a non-luminous object i.e. it cannot produce light of its own.
The objects which partially allow light to pass through them are called translucent objects, and smoke is an appropriate example for these.