Select the odd word/letters/number/word pair/number pair from the given alternatives.
1 + 2 +Â 3 = 6
2 + 3 + 4 = 9
8 +Â 9 +Â 0 = 17
5 +Â 6 + 7 = 18
In the 890, addition of all digits is a prime number.
$$\therefore$$ The correct answer is option C.
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