Select the related word/letters/number from the given alternatives.
761 = 76 - 1 =75,
928 = 92 - 8 = 84,
and
84 - 75 = 9
Similarly,
651 = 65 - 1 = 64,
807 = 80 - 7 = 73,
73 - 64 = 9
$$\therefore$$ The correct answer is option C.
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