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Solution
The numbers are of the form : $$n^2+n$$
(A) : $$(8)^2+8=72$$
(B) :Â $$(6)^2+6=42$$
(C) :Â $$(12)^2+12=156$$
(D) :Â $$(4)^2+4=20\neq12$$
=> Ans - (D)
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