An alkane [X] contains five $$1º$$, two $$2º$$, one $$3º$$ and one $$4º$$ carbon atoms. The IUPAC name of [X] is

A

2,4,4-trimethylhexane

B

3,5-dimethylheptane

C

2,4-dimethylheptane

D

4,4-dimethylheptane