Correct Answer: (a) Bihar, Uttar Pradesh, Madhya Pradesh, Odisha
Solution:According to the report of World Bank, in the question period more than 50 percent of poor people were living in these four States of the country: Bihar, Uttar Pradesh, Madhya Pradesh and Odisha. As per the estimates of 2011-12 (Tendulkar methodology), the five States with the highest poor population in descending order were as follows: 1. Uttar Pradesh (598.19 lakh), 2. Bihar (358.15 lakh), 3. Madhya Pradesh (234.06 lakh), 4. Maharashtra (197.92 lakh), and 5. West Bengal (184.98 lakh).