The most appropriate choice for ratio will be given by-
Jim did not write the correct equivalent ratio.
What is ratio?
Ratio is used to compare between two numbers of the same unit. Ratio determines how much one number is bigger as compared to other.
Suppose the ratio is a : b. a is called the antecedent and b is called the consequent.
Equivalent ratio of 
Answer of Cristal =
which is equal to
.So answer of Cristal is correct
Answer of Esmeralda =
which is equal to
. So answer of Esmeralda is correct
Answer of Jim =
which is equal to
.So answer of Jim is not correct
Answer of Marcus =
which is equal to
. So answer of Marcus is correct
So Jim did not write the correct equivalent ratio.
To learn more about ratio, refer to the link:
brainly.com/question/2328454
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Complete Question
Four students were asked to write a ratio equivalent to
Their answers are shown below.
Cristal 
Esmeralda 
Jim 
Marcus 
Which student did not write a ratio that is equivalent to
?