<em>d. All of the great works of the king have decayed to ruin.</em>
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<u>Explanation:</u>
The given lines “<em>my name is Ozymandias, king of kings, look on my works, Ye mighty and despair</em>” are ironic because even his statue which is so large has been destructed. It hints on the fact that pride and materialistic power is a temporary thing and it will eventually end. Everything in world is subjected to decadence. This is what happens with Ozymandias and the speeches given by him is a decay.