NEW DELHI: Retail inflation soared to a 15-month high in July as food prices jumped sharply, hit by supply woes, posing a fresh challenge for authorities battling stubborn prices.Data released by the Natio nal Statistical Office (NSO) on Monday showed retail inflationas measured by the consumer price index (CPI) rose an annual 7.4% in July from the previous month’s 4.9%.This is the highest since the 7.8% increase in April 2022.The food price index moved into double digits at 11.5% from 4.6% in June.Retail inflation in rural areas higher...