In this task, you need to provide the correct option for a given problem on probability from the provided options.

Problem: find the probability that a leap year selected at random will not have 53 sundays or mondays . 
Options: a ) 6 / 7 , b ) 5 / 7 , c ) 4 / 7 , d ) 3 / 7 , e ) 2 / 7
c