Hi Rajesh,
What issue you are facing with that approach?
Alternatively, you can use "Conditional Startup" to achieve this one.
Go to Workflow Settings --> "Start when Items are modified" --> select, "Conditional" from drop down, then click on "Conditions" button
In "Conditional Startup Options" dialog, create conditions for column1 and column2 with one workflow, and create another workflow for column3 and column4 changes.
I know there would be multiple workflows (2 in this case), use this link and refer my answer for screenshots on how to use the conditional start.
Let me know if you have any questions.
Thanks,
Krishna.
Thank you for reply. i have achieved above issue and i did some modification in loop section.
please find below screenshot. it will help for others.