The correct option is B Translucent - Smoke
The objects which allow all the light to pass through them are called transparent objects. The objects which partially allow light to pass through them are called translucent objects. The opaque objects do not allow light to pass through them, like human body. We know the Moon is a non-luminous object i.e. it cannot produce light of its own. So the most appropriate pair is Translucent - Smoke.