Correct Answer: (b) Gautam Buddha Nagar, Kanpur Nagar, Auraiya, Etawah
Note: According to Census of 2011, the exact decreasing sequence of the most four average literacy districts in Uttar Pradesh are Gautam Buddha Nagar (80.12%), Kanpur Nagar(79.65%), Auraiya(78.95%), Etawah (78.41%).