Silchar, June 11: The demise of a retired teacher, M Naba Kumar Singha (76), of Mayalaikai in Binnakandi Part – II has sent waves of shock to people. He was an ideal man and held high principles in life. He was a teacher of Arkatipur Senior Basic School. M Naba Kumar Singha died at his own residence. He is survived by his wife, 2 sons and 2 daughters.