Ironically Ozymandias had expected -

a. his monument to fall into ruins, and it did

b. his name to be remembered forever, but it has been forgotten

c. his works to endure, but they have fallen into ruin

d. to be forgotten, but he has left a historic ruin behind

I'm not sure but I think the answer is c

c. His works to endure, but they have fallen into ruin.

Explanation:

In the poem Ozymandias, we learn of an ancient Egyptian king called Ozymandias. The king was extremely powerful and wealthy, and he created grand monuments that reflected this. In one of his monuments, we can read the following phrase:

"My name is Ozymandias, King of Kings;

Look on my Works, ye Mighty, and despair!"

This shows that Ozymandias believed travellers were going to be impressed with his wealth and success when looking at his works. However, we learn that, ironically, this monument in ruins is the only thing that remains, and nowhere else can we see any evidence of the king Ozymandias.