The pattern followed is that the positive difference of the number is multiplied by 2.
Eg : 52Â % 32 = $$(52-32)\times2=20\times2=40$$
and 22Â % 20 = $$(22-20)\times2=2\times2=4$$
Similarly, 15 % 11 = $$(15-11)\times2=4\times2=8$$
=> Ans - (D)
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