Wholesale price based inflation dropped to a nine-month low of 4.68 per cent in February this year, from 5.05 per cent in January, as prices of kitchen staples like onions and potatoes eased.According to official data released on Friday, food inflation based on the Wholesale Price Index, fell to 8.12 per cent in February, from 8.8 per cent in January, as the rate of price rise slowed in almost all items.Overall inflation in the vegetable basket dropped to 3.99 per cent in February, from 16.6 per cent in January.Retail inflation, reported earlier this week, had dropped to a 25-month low of 8.1 per cent in February.