Correct option is A
In August 2016, India's retail inflation, measured by the Consumer Price Index (CPI), eased to 5.05%, as reported by various economic sources like the Ministry of Statistics and Programme Implementation (MOSPI). This decline in inflation was largely attributed to a slower rate of increase in vegetable and food prices, particularly in comparison to previous months. Hence, both the assertion and the reason are correct, and the reason appropriately explains the assertion.