Mamoni Chetia of Parbotia College Road Tinsukia breathed her last at her residence on Friday due to old age ailment. She was 89. A pious lady, she was closely associated with socio-religious organisations and revered by all. Her death has cast a pall of gloom in the locality. She was the wife of late Dr Bipin Chetia, former vice principal of Tinsukia College and leaves behind 2 sons and a daughter besides grandchildren and host of admirers and relatives.