Problem with 'sed' command

[Nehul Khatri]

Hi,

I am using the sed command for a "search and replace" operation.

I am trying to replace a string with a '   like for example. I want to
replace Kitten' with Kitten". So the command i am using is

sed 's/Kitten'/Kitten"/g' cat.txt

but it throws and error saying

Unmatched '

So it takes the ' in the input (Kitten') to be the end of the the string and
the actual ' which signifies end of string is treated as Unmatched '

How can we actually search and replace a string with ' in it.

Thanks,
Nehul.