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

[EX Q]: Problem: in a certain alphabet , 16 letters contain a dot and a straight line . 30 letters contain a straight line but do not contain a dot . if that alphabet has 50 letters , all of which contain either a dot or a straight line or both , how many letters contain a dot but do not contain a straight line ?
Options: a ) 4 , b ) 8 , c ) 12 , d ) 16 , e ) 20
[EX A]: a

[EX Q]: Problem: the least whole number which when subtracted from both the terms of the ratio 6 : 7 to give a ratio less than 16 : 21 , is ?
Options: a ) 3 , b ) 4 , c ) 5 , d ) 6 , e ) 7
[EX A]: a

[EX Q]: Problem: which digits should come in place of @ and # if the number 62684 @ # is divisible by both 8 and 5 ?
Options: a ) 4,0 , b ) 0,4 , c ) 4,4 , d ) 0,0 , e ) none
[EX A]:
a