Direct speech: "The cat was run over by the truck." Convert to indirect speech:

He said the cat is run over by the truck.

He said the cat was being run over by the truck.

He said the cat had been run over by the truck.

He said the cat was run over by the truck.

To convert the sentence "The cat was run over by the truck" into indirect speech, you need to adjust the tense appropriately.

The original sentence is in the past passive voice.

In indirect speech, you would maintain the same tense as in the original sentence.

So the correct option is: He said the cat was run over by the truck.