Select the option that is related to the third numberin the same way as the second number is related to the first number.
9 : 90 :: 12 : ?
As per the question,
9 : 90 :: 12 :?
Here, 9 is related with the 90 as $$ 9^2+9=90$$
Similarly 12 is related with 156 as $$12^2+12=156$$
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