I laughed _____ him _____ making silly mistake. - IQ786

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I laughed _ him _ making silly mistake.

I laughed _ him _ making silly mistake.

On, for

On, of

At, for

None of these

Explanation

"I laughed at him for making a silly mistake."

"Laughed at" is the correct phrase used when you are mocking
"For" is used to explain the reason for the action (in this case, making a silly mistake).