As per the data, the retail inflation rate on a year-on-year basis rose due to higher prices of food items like vegetables, milk-based products, eggs, meat and fish, as well as increased fuel rates.
On a sub-category basis, vegetables in May became costly by 8.04 per cent, while prices of milk-based products rose by 3.2 per cent.
Other notable sub-categories such as cereals became dearer by 2.78 per cent and meat and fish recorded a rise of 3.53 per cent.
The category of food and beverages during the month under consideration recorded a rise of 3.37 per cent over the same period last year.
Among non-food categories, the "fuel and light" segment's inflation rate accelerated to 5.8 per cent in May.
Last week, following a cycle of rate cuts begun in January 2015, the Reserve Bank of India (RBI) raised its key interest rate for the first time by 25 basis points, to 6.25 per cent, responding to concerns on inflation from surging global crude oil prices.
The RBI also revised upwards the retail inflation range to 4.8-4.9 per cent in the first half of 2018-19, and to 4.7 per cent in the second half, including the impact of house rent allowance for central employees, and with risks on the upside.
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