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

Example Input: Problem: 4 dice are thrown simultaneously on the board . find the probability show the same face ? 
Options: a ) 2 / 113 , b ) 1 / 215 , c ) 1 / 216 , d ) 3 / 113 , e ) 4 / 113
Example Output: c

Example Input: Problem: x , y , and z are all unique numbers . if x is chosen randomly from the set { 6 , 7 , 8 , 9 , 10 , 11 } and y and z are chosen randomly from the set { 20 , 21 , 22 , 23 } , what is the probability that x and y are prime and z is not ? 
Options: a ) 1 / 5 , b ) 3 / 20 , c ) 2 / 15 , d ) 1 / 12 , e ) 1 / 10
Example Output: d

Example Input: Problem: a fair coin is tossed 5 times . what is the probability that it lands heads up at least twice ? 
Options: a ) 1 / 16 , b ) 5 / 16 , c ) 2 / 5 , d ) 13 / 16 , e ) 27 / 32
Example Output:
d