Instructions: In this task, you need to provide the correct option for a given problem from the provided options.
Input: Problem: in a group of 100 people , 55 have visited iceland and 43 have visited norway . if 61 people have visited both iceland and norway , how many people have visited neither country ?
Options: a ) 60 , b ) 61 , c ) 62 , d ) 63 , e ) 64
Output:
d