Tamil Nadu Public Service Commission’s (TNPSC) Group 4 Exam Eligibility Details are as follows. Eligibility Conditions: I. Age Limit: Sl. No. Category of Candidates Minimum Age Maximum Age 1 Scheduled Caste / Scheduled Caste (Arunthathiyars), Scheduled Tribes and Destitute Widows of all castes 18 Years 35 Years 2 Most Backward Classes / Denotified Communities, Backwardmore..