Please look at this forum thread to check teaching and research licenses:
https://forum.ansys.com/forums/topic/how-to-check-out-a-teaching-license-vs-research-license/
To learn about options file, please folow this link:
https://optics.ansys.com/hc/en-us/articles/4403333893267-Controlling-access-to-the-license-using-the-options-file