Explanation:

- Absolute Poverty: Measures poverty based on a fixed standard, usually a minimum level of income or resources required to maintain a basic living standard. It is not ideal for comparing poverty across different regions as it doesn't consider regional cost differences.

- Relative Poverty: Assesses poverty in relation to the economic conditions of a specific region. It compares individuals or families to the wider population, making it suitable for regional comparisons.

- Both (a) and (b): This option implies using both absolute and relative measures to compare poverty, which can provide a more holistic view but is less common.

- None of these: Implies neither of the methods are suitable, which generally isn't the case.

Correct Answer: Option 2 - Relative