Which Lenovo - Thinkpad & Non Thinkpad series give option for Windows Pro preinstalled when ordering

Which Lenovo - Thinkpad & Non Thinkpad series give options for Windows Pro preinstalled when ordering?

I've mostly used Thinkpads in the US and so getting them was not an issue.

I might have to order/ help get 1-2 portables (laptop/ 2 in 1 etc or so) for a small team in India. Thinkpad prices here are prohibitive.

I am curious what series of Lenovo machines allow for PRO upgrades pre installed when ordering?

I am guessing E series Thinkpads do, what others - Thinkpad or Non thinkpad...

Which Lenovo - Thinkpad & Non Thinkpad series give option for Windows Pro preinstalled when ordering

Which Lenovo - Thinkpad & Non Thinkpad series give option for Windows Pro preinstalled when ordering