* वर्गः (vargaḥ): This is the most general term for "class," meaning a group of people or things with common characteristics.
* श्रेणी (śreṇī): This refers to a "class" in the sense of a social rank or stratum.
* पाठशाला (pāṭhaśālā): This is a more specific term for a "school" or "classroom," literally meaning "place of study."
* कक्षा (kakṣā): This is the most common term used for "class" in modern Sanskrit, similar to the English usage.
The best choice will depend on the specific context.
For example, if you are talking about a group of students in a school, "कक्षा" would be the most appropriate. If you are talking about a social class, "श्रेणी" would be more suitable.