The following question, consist of two words each that have a certain relationship to each other, followed by four lettered pairs of words. Select the lettered pair that has the same relationship as the original pair of words:
Carbon : Diamond :: Corundum : ?

A. Army B. Defeat C. Arsenal D. Destruction

A. Example B. Wall C. Colour D. Frame

A. Ship B. War C. Submarine D. Missile

A. Commerce B. Economy C. Goods D. Trade Policy