This is the slowest pace of price rise, as measured by the Wholesale Price Index, since July 2013, when inflation was 5.8 per cent. In November, wholesale price inflation increased at the fastest pace in 14 months at 7.52 per cent.
The moderation in December WPI figures comes on the back of easing prices of essential food items, including vegetables, cereals and protein-rich items.
Inflation in vegetables declined to 57.33 per cent in December from 95.25 per cent in the previous month. This was driven by onion prices, which gained 39.56 per cent compared with a 190.34 per cent rise in November.
However, the rate at which potato prices rose was more than double at 54.65 per cent in December over November.
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Inflation in fruits and protein-rich items such as eggs, meat and fish stood at 9.07 per cent and 11.40 per cent, respectively. In milk, inflation increased to 6.93 per cent.
Industry chambers have pitched for lower interest rates to prop up growth. Industrial output in November contracted 2.1 per cent, the worst performance in six months.
"The easing of inflation at a time when industrial growth continues to be in the red should induce RBI to review its monetary policy stance and cut its policy rates to rejuvenate growth, which has been hit by high interest costs, flagging investments and subdued demand," CII Director General Chandrajit Banerjee said.