In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Input: Consider Input: Problem: how many even 4 - digit numbers can be formed , so that the numbers are divisible by 4 and no two digits are repeated ? 
Options: a ) 336 , b ) 784 , c ) 1120 , d ) 1804 , e ) 1936

Output: c


Input: Consider Input: Problem: the greatest number which on dividing 1657 and 2037 leaves remainders 10 and 7 respectively , is : 
Options: a ) 123 , b ) 1 , c ) 235 , d ) 305 , e ) 505

Output: b


Input: Consider Input: Problem: a tank holds x gallons of a saltwater solution that is 20 % salt by volume . one fourth of the water is evaporated , leaving all of the salt . when 10 gallons of water and 20 gallons of salt are added , the resulting mixture is 33 1 / 3 % salt by volume . what is the value of x ? 
Options: a ) 37.5 , b ) 75 , c ) 100 , d ) 150 , e ) 175


Output: d