The correct option is C 56
After careful analysis of the given input and various steps of rearrangement, it is evident that in each step one word and one number are rearranged.
The words are rearranged from left in alphabetical order and the numbers are rearranged from the right in descending order but in the final step the word get rearranged in alphabetical order in reserves manner and number appear in descending order.
Input: 31 rise gem 15 92 47 aim big 25 does 56 not 85 63 with moon.
Step I: aim 31 rise gem 15 47 big 25 does 56 not 85 63 with moon 92.
Step II: big aim 31 rise gem 15 47 25 does 56 not 63 with moon 92 85.
Step III: does big aim 31 rise gem 15 47 25 56 not with moon 92 85 63.
Step IV: gem does big aim 31 rise 15 47 25 not with moon 92 85 63 56
Step V: moon gem does big aim 31 rise 15 25 not with 92 85 63 56 47.
Step VI: not moon gem does big aim rise 15 25 with 92 85 63 56 47 31.
Step VII: rise not moon gem does big aim 15 with 92 85 63 56 47 31 25.
Step VIII: with rise not moon gem does big aim 92 85 63 56 47 31 25 15.
56 is in fifth position form the right in the last step.