Which of the following is not another representation of isopentane?
A. `CH_3-CH_2-underset(underset(CH_3)|)overset(overset(H)|)(C)-CH_3`
B.
C. `CH_3-CH(CH_3)CH_2-CH_3`
D. `H-underset(underset(H_3C-underset(underset(H)|)C-CH_3)|)overset(overset(H)|)(C)-CH_3`