Instructions: In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Input: Problem: the first , second and third terms of the proportion are 56 , 16 , 49 . find the fourth term .
Options: a ) 10 , b ) 14 , c ) 40 , d ) 50 , e ) 60
Output:
b