Hi Binoy,
I am Sumit, an Independent Advisor and a 3 year Windows Insider MVP here to help.
This is done by a registry error usually triggered by a 3rd party program like Notepad++. Use the Restore_New_Text_Document_context_menu_item.reg to restore the same.
How to Add or Remove Default New Context Menu Items in Windows 10
https://www.tenforums.com/tutorials/24412-add-r...
Content on the above blog is written by a Microsoft MVP so it is safe. However, do watch out for the ads.