In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Q: Problem: if the sum of a number and its square is 210 , what is the number ? 
Options: a ) 16 , b ) 14 , c ) 25 , d ) 87 , e ) 171
A: 
b