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

Problem: a , b , c , d , e sitting in a row what is the probability that a & b sitting adjacent . 
Options: a ) 1 / 5 , b ) 2 / 5 , c ) 3 / 5 , d ) 4 / 5 , e ) 6 / 5
b

Problem: if 4 people are selected from a group of 6 married couples , what is the probability that none of them would be married to each other ? 
Options: a ) 1 / 33 , b ) 2 / 33 , c ) 1 / 3 , d ) 16 / 33 , e ) 11 / 12
d

Problem: if two integers x , y ( x > y ) are selected from - 10 to 1 ( inclusive ) , how many possible cases are there ? 
Options: a ) 150 , b ) 66 , c ) 190 , d ) 210 , e ) 240

b