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

[Q]: Problem: if log 1087.5 = 3.9421 , then the number of digits in ( 875 ) 10 is ? 
Options: a ) 30 , b ) 28 , c ) 27 , d ) 50 , e ) 25
[A]: d


[Q]: Problem: the ratio of 2 numbers is 3 : 4 and their h . c . f . is 4 . their l . c . m . is ? 
Options: a ) 20 , b ) 24 , c ) 48 , d ) 36 , e ) 60
[A]: c


[Q]: Problem: if log 10 2 = 0.30103 , find the value of log 10 50 
Options: a ) 1.69897 , b ) 2.69897 , c ) 1.99897 , d ) 0.69897 , e ) 5.69897
[A]:
a