Task: Question Answering
Input (English): Problem: if 2.5 of a number is equal to 0.75 of another number , the ratio of the numbers is : 
Options: a ) 2 : 3 , b ) 3 : 4 , c ) 3 : 10 , d ) 20 : 3 , e ) 30 : 7
Output (English): c