Which 12th pass jobs in state PSCs offer group C positions?
Group C positions are usually clerical level, data entry operators, typists, and assistants. Many state PSCs open vacancies for such jobs every year. Being 12th pass is enough in most cases, but some states ask for typing certificate or computer course completion. You should check your own state PSC notifications.
My cousin got a Group C clerk job through Tamil Nadu PSC after completing 12th. She said the exam was not too tough, mostly general knowledge and typing test. If you are serious, you should look at your state PSC website regularly.
Group C jobs after 12th are considered entry level. Later, through departmental exams, you can get promoted. If you want long term government career, Group C is a good option. But competition is high since many students apply. Better start preparation early.