Find out the wrong term: 1, 5, 5, 9, 7, 11, 11, 15, 12, 17

The answer is $\boxed{\text{D}}$, 15.

The sequence is a combination of two arithmetic sequences: 1, 5, 9, 13, … and 5, 7, 9, 11, … The first sequence has a common difference of 4, and the second sequence has a common difference of 2. The terms in the sequence are alternately from the two sequences, starting with the first sequence. Therefore, the terms in the sequence should be 1, 5, 5, 9, 7, 11, 11, 13, 15, 17. The term 15 does not belong in the sequence.