The annual retail inflation was 7.41% in September.
Food prices, which account for nearly 40% of the CPI basket, rose 7.01% in October, compared with 8.60% in September.
Month-on-month retail inflation rose 0.80% in October, compared with the previous month, while retail food inflation rose 1.08% — reflecting inflationary pressures in the economy.
Last week, ratings agency Moody's revised down India's GDP growth forecast to 7% in 2022, from earlier estimate of 7.7%, and to 4.8% in 2023.
Excluding the volatile food and energy components, the core inflation rose 5.9% to 6.3% last month, according to three economists' estimates, compared to 6.07% to 6.1% in September.