If the income elasticity of demand for a commodity is found to be 0.4, then the commodity concerned is May 4, 2021 by admin Question: If the income elasticity of demand for a commodity is found to be 0.4, then the commodity concerned is A. Luxury B. Necessity C. Giffen’s goods D. Independent good Answer» b. Necessity Note: The above multiple-choice question is for all general and Competitive Exams in India.