Declining price of food items, including fruits and vegetables, pulled down inflation to nearly a three-and-a-half-year low of 4.89 per cent in April. Inflation based on the Wholesale Price Index, WPI stood at 5.96 per cent in March. In April, 2012, it was 7.50 per cent. This is the lowest level of inflation since November, 2009, when it was 4.78 per cent.As per official data released today, WPI inflation in the manufactured items category declined to 3.41 per cent in April from 4.07 per cent in March. Also, inflation in food articles category came down to 6.08 per cent. Inflation in this category was at 8.73 per cent in March. The inflation in fruits declined to 0.71 per cent during the month as compared to 4.71 per cent in March.However, the rate of price rise in onion was high at 91.69 per cent for the month of April, as against inflationrate of 94.85 per cent in the previous month.