The annual rate of Inflation, measured on Wholesale Price Index, for November dropped to zero per cent from 1.77 per cent in October. According to official data released today, the index of food articles group fell to nearly three year low of 0.63 per cent, due to lower price of bajra and tea, ragi and fruits and vegetables. However, the price of moong, fish, egg, coffee and mutton, wheat, arhar and condiments and spices moved up.