The free coaching class for candidates appearing for Group II examinations of the Tamil Nadu Public Service Commission, organised by the Self Study Circle of the District Employment Office, commenced here on Tuesday. The class was inaugurated by N. Muralidharan, Joint Director of Employment, Tiruchi. Those interested in joining the classes can contact the Employment Office, an official release said. Persons belonging to Denotified Classes can apply to enrol themselves of members of State Welfare Board for Denotified Communities, Collector K.S. Palanisamy said in a press release. Those interested can contact the District Backward Classes and Minorities Welfare Officer, he added.