Please help A new mutation arises in a population of spider

Please help !!

A new mutation arises in a population of spiders (which are diploid) with an effective population size of 116. If that mutation is neutral, what is the probability that it will go to fixation? a) 1 b) 0.0043 c) 0.045 d) 0 e) 0.062

Solution

probability that will go to fixation =1/2Ne

                                                 =1/2(116)=1/232=0.0043

Option b is correct