Correct option is D
Core inflation is a measure of inflation that excludes items with highly volatile prices, mainly:
Food, and
Energy (fuel, power)
The purpose of core inflation is to capture the underlying, persistent trend in prices, which is more relevant for monetary policy decisions.
Food prices are subject to frequent volatility due to:
Weather conditions (monsoon, droughts)
Seasonal supply fluctuations
Agricultural shocks
Therefore, food prices are excluded from core inflation
Energy prices (fuel, electricity, gas) are influenced by:
Global crude oil prices
Geopolitical events
Tax changes
Because of this volatility, energy prices are also excluded from core inflation.