Food inflation rose marginally to 16.37 per cent for the week ended October 2, on the back of higher prices of cereals, fruits, select vegetables and milk. It was 16.24 per cent for the week ended September 25.As per the latest figures, food inflation was driven mainly by higher prices of pulses, rice and wheat. Besides, vegetables became expensive by 19.84 per cent on annual basis, the highest increase in many months.Official data released in New Delhi showed that on an annual basis, cereals prices have risen by 5.06 per cent. Prices of pulses also rose by 4.89 per cent on a yearly basis.