05.10.2023: Periyar 145th birthday celeberation at ONGC Officer, Chennai. Organised by A.I ONGC OBC & MOBC EWA. Dy.G.S of Dravidar Kazhagam Advovate Mathivathani delivered special address on Periyar, Chief guest Shri.Santanu Mukherjee, CGM, Kauvery Basin, ONGC