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In the following question, select the related number from the given alternatives.
11 : 121 :: 15 : ?
The logic here is
11$$^2$$ = 121 $$\longrightarrow\ $$ $$\text{first number}^2=\text{second number}$$
Similarly, the required number = 15$$^2$$ = 225
Hence, the correct answer is Option C
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