The pattern in the sequence is +7, +5, +3, and +1.
So, the next number in the sequence should be 12 + 1 = 13.
Therefore, the answer is not provided in the options given.
The pattern in the sequence is +7, +5, +3, and +1.
So, the next number in the sequence should be 12 + 1 = 13.
Therefore, the answer is not provided in the options given.