OnChange client script or business rule to not all change form to close if category is other and to remain on the review state with an error message

[Lydon]

I have a requirement to not allow change for to close if category is "other" and state is "close"

I did a business rule and does not work as expected.

I would like to see the firm stay on review with an error message, "please select correct category besides other" 

I feel like an OnChange client script will work better but not very familiar with client scripts

Can I get help please 

[Lydon]

@Aman Kumar

This scipt will be for onChange correct 

[Aman Kumar S]

This will be in your BR, client script will not be optimal.