In this task, you need to provide the correct option for a given problem from the provided options.

Ex Input:
Problem: divide $ 2000 among b , c in the ratio 4 : 16 . how many $ that c get ?
Options: a ) $ 1200 , b ) $ 1400 , c ) $ 1600 , d ) $ 1800 , e ) $ 2000

Ex Output:
c

Ex Input:
Problem: what is the square root of 261,121 ?
Options: a ) 476 , b ) 489 , c ) 497 , d ) 511 , e ) 524

Ex Output:
d

Ex Input:
Problem: a marketing firm determined that , of 200 households surveyed , 80 used neither brand w nor brand b soap , 60 used only brand w soap , and for every household that used both brands of soap , 3 used only brand b soap . how many of the 200 households surveyed used both brands of soap ?
Options: a ) 15 , b ) 20 , c ) 30 , d ) 40 , e ) 45

Ex Output:
d