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Solution
A number is divisible by 12 if it is divisible by 3 and 4.
A number is divisible by 3 if the sum of the digits of the number is divisible by 3.
A number is divisible by 4 if the last two digits of the number is divisible by 4.
From the given options, Except Option C, all other options are not divisible by 3.
7+3+4+1+2 = 17
6+3+4+1+2 = 16
8+3+4+1+2 = 18
9+3+4+1+2 = 19
Hence, 83412 is divisible by 12.
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