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

Input: Consider Input: Problem: find the ratio between 1 hr 30 minutes and 2 hrs 40 minutes . 
Options: a ) 9 : 16 , b ) 5 : 9 , c ) 12 : 17 , d ) 13 : 24 , e ) none of these

Output: a


Input: Consider Input: Problem: in a group of 90 students , 36 are taking history , and 32 are taking statistics . if 57 students are taking history or statistics or both , then how many students are taking history but not statistics ? 
Options: a ) 9 , b ) 19 , c ) 25 , d ) 27 , e ) 31

Output: c


Input: Consider Input: Problem: the h . c . f . of two numbers is 25 and the other two factors of their l . c . m . are 14 and 16 . the larger of the two numbers is 
Options: a ) 276 , b ) 299 , c ) 312 , d ) 400 , e ) none


Output: d