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

Input: Consider Input: Problem: a 30 kg metal bar made of alloy of tin and silver lost 3 kg of its weight in the water . 10 kg of tin loses 1.375 kg in the water ; 5 kg of silver loses 0.375 kg . what is the ratio of tin to silver in the bar ? 
Options: a ) 1 / 4 , b ) 2 / 5 , c ) 1 / 2 , d ) 3 / 5 , e ) 2 / 3

Output: e


Input: Consider Input: Problem: log 3 n + log 12 n what is 3 digit number n that will be whole number 
Options: a ) 6291 , b ) 7292 , c ) 1728 , d ) 1929 , e ) 1727

Output: c


Input: Consider Input: Problem: the sub - duplicate ratio of 1 : 9 is 
Options: a ) 4 : 3 , b ) 1 : 2 , c ) 1 : 3 , d ) 1 : 4 , e ) 2 : 3


Output: c