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

Problem: the compound ratio of 1 : 3 , 3 : 2 and 4 : 5 ? 
Options: a ) 1 : 9 , b ) 1 : 7 , c ) 1 : 2 , d ) 2 : 5 , e ) 1 : 4
d

Problem: what is the square root of 121 ? 
Options: a ) 11 , b ) 12 , c ) 16 , d ) 18 , e ) 25
a

Problem: if the ratio of s . i earned on certain amount on same rate is 4 : 5 . what is the ratio of time ? 
Options: a ) 1 : 2 , b ) 6 : 9 , c ) 4 : 5 , d ) 2 : 3 , e ) not possible to calculate

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
c

