Correct Answer: (c) Bihar, Arunachal Pradesh, Rajasthan, Jharkhand
Solution:As per final data of Census 2011, the correct ascending order of the four States with lowest literacy is: Bihar (61.8%) < Arunachal Pradesh (65.4%) < Rajasthan (66.1%) <Jharkhand (66.4%). This order was also the same as per provisional figures of Census 2011.