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

Q: Problem: the ratio between the present ages of a and b is 3.5 : 3 respectively . the ratio between a ' s age 4 years ago and b ' s age 4 years hence is 1 : 1 . what is the ratio between a ' s age 4 years hence and b ' s age 4 years ago ? 
Options: a ) 14 : 4 , b ) 13 : 0 , c ) 15 : 11 , d ) 13 : 12 , e ) 13 : 17

A: c
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Q: Problem: there are 2 available positions and 50 candidates , one half of whom are democrats and another half are republicans . if it was decided that the positions would be filled at random , then what is the probability e that the both positions will be taken by members of just one party ? 
Options: a ) 1 / 25 , b ) 12 / 49 , c ) 1 / 4 , d ) 24 / 49 , e ) 1 / 2

A: d
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Q: Problem: ratio between rahul and deepak is 4 : 2 , after 6 years rahul age will be 22 years . what is deepak present age 
Options: a ) 9 , b ) 3 , c ) 5 , d ) 2 , e ) 7

A:
d
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