Select the combination of letters that when sequentially placed in the gaps of the given letter series will complete the series.
T C _ M B C _ N T _ Q M _ C D _ T _ Q M B _ D N

By Trail and Error method,

Option A

T C Q M B C B N | T C Q M D C D N | T N Q M B C D N

The above letters do not form a series. Hence option A is incorrect.

Option B

T C T M B C D N | T C Q M B C D N | T C Q M B D D N

The above letters do not form a series. Hence option B is incorrect.

Option C

T C Q M B C D N | T C Q M B C D N | T C Q M B C D N

The above letters form a series.

Hence, the correct answer is Option C