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'.

[Q]: Problem: 120 + 520 5.00 = ?
Options: a ) 100 , b ) 150 , c ) 120 , d ) 520 , e ) none
[A]: e

[Q]: Problem: if 213 16 = 3408 , then 16 21.3 is equal to :
Options: a ) 0.3408 , b ) 3.408 , c ) 34.08 , d ) 340.8 , e ) none of these
[A]: d

[Q]: Problem: if a # b = ab b + b ^ 2 , then 3 # 6 =
Options: a ) 2 , b ) 8 , c ) 15 , d ) 21 , e ) 48
[A]:
e