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

Ex Input:
Problem: there are 8 executives , including the ceo and cfo , that are asked to form a small team of 4 members . however , the ceo and cfo may not both be assigned to the team . given this constraint , how many ways are there to form the team ?
Options: a ) 45 , b ) 55 , c ) 65 , d ) 75 , e ) 85

Ex Output:
b

Ex Input:
Problem: 5 % of men have unlisted phone numbers and 4 % of women have unlisted phone numbers . population ratio of men : women in the city of gpuzzles is 4 : 3 . if we select randomly 100 people from the phone directory , can you tell us how many people selected will definitely have unlisted phone numbers ?
Options: a ) 0 % , b ) 1 % , c ) 2 % , d ) 3 % , e ) 4 %

Ex Output:
a

Ex Input:
Problem: the h . c . f . of two numbers is 42 and the other two factors of their l . c . m . are 12 and 14 . the larger of the two numbers is :
Options: a ) 588 , b ) 642 , c ) 567 , d ) 344 , e ) 789

Ex Output:
a