If Mary Took the an IQ Test Using a Ratio

If Mary took the an IQ test using a Ratio IQ and whose CA is 20 and there MA is 30, what does this mean?

A) Mary is 40 years old with the mental age of a 20 year old and an IQ of 66.7.
B) Mary is 20 years old with the mental age of a 40 year old and an IQ of 66.7.
C) Mary is 20 years old with the mental age of a 40 year old and an IQ of 150.
D) Mary is 40 years old with the mental age of a 20 year old and an IQ of 50.

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