Question: The 13C spectrum of which isomer of C6H14 has lines with three distinct chemical shifts?
A: hexane
B: 2-methylpentane
C: 3-methylpentane
D: 2,3-dimethylbutane
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option. Provide response in all capital letters, no lowercase letters allowed.
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