The correct answer is (a).

According to the Census 2011, the districts of Uttar Pradesh having highest literacy rate are:

  1. Ghaziabad - 82.09%
  2. Gautam Buddh Nagar - 80.05%
  3. Kanpur City - 78.25%
  4. Auraiya - 69.37%

Therefore, the correct descending order is:

  1. Ghaziabad
  2. Gautam Buddh Nagar
  3. Kanpur City
  4. Auraiya