MUMBAI: India's consumer economy is showing uneven signs of growth ahead of Diwali, with some segments reporting robust demand while others remain subdued amid high inflation, rising input costs and a shift in the festive season from the September to the December quarter. Food and grocery recorded among the highest growth rates in July and August, at 12% year on year in the latest months for which data are available, according to consulting firm Deloitte's latest Consumer Signals report for India.