Select the related word/letters/number from the given alternatives.
Expression =Â 6 : 18 :: 4 : ?
The pattern followed is = $$n:\frac{n^2}{2}$$
Eg :- $$\frac{(6)^2}{2}=\frac{36}{2}=18$$
Similarly, $$\frac{(4)^2}{2}=\frac{16}{2}=8$$
=> Ans - (D)
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