Answer: Option 'c' is correct.
Explanation:
Since we have given that 
“If a figure is a rectangle, then it has four right angles.” 
We need to find the inverse of above statement.
So, Inverse would be 
If it has four right angles, then the figure is a rectangle.
As we know that in case of inverse, the conclusion becomes the hypothesis and hypothesis becomes the conclusion.
Hence, Option 'c' is correct.