Explanation:

- Core inflation provides a clearer view of long-term inflation trends by focusing on the less volatile components of the price index.

- Option 1: Ignores articles of volatile nature in the price index - Correct. Core inflation excludes volatile items like food and energy, which can cause significant short-term fluctuations in prices.

- Option 2: Considers articles of volatile nature in the price index - This is characteristic of headline inflation, not core inflation.

- Option 3: Is not based on commodity price index - This is misleading; core inflation does use a similar base index but with exclusions.

- Option 4: Considers only core items of consumption in the price index - It focuses on stable items but not exclusively on "core" consumption items.