Galloping prices of potatoes and pulses raised food inflation to 19.95 per cent in the first week of December against 19.05 per cent in the previous week.
On an annual basis, potato prices more than doubled at 136 per cent and pulses became costly by over 40 per cent, while onion rose by 15.4 per cent.
The spike in prices was significant also on a weekly basis, with urad and spices rising by 3 per cent while milk rose by 2 per cent.
At the same time, maize, barley, pork, masur and wheat was costlier by one per cent each.
However, the prices of poultry chicken declined by 10 per cent and tea by 2 per cent.
Among the non-food articles, raw jute turned expensive by 11 per cent and mustard seed by 4 per cent.
The fuel index declined during the week due to lower prices of aviation turbine fuel.