A Student Gave a Molecule the Following Name: 2-Ethyl-3-Methyl-5-Isopropylhexane However,his

A student gave a molecule the following name: 2-ethyl-3-methyl-5-isopropylhexane However,his TA pointed out that,although the molecule could be correctly drawn from this name,the name violates the systematic rules.What is the correct (systematic) name of the molecule?

A) 3,4-dimethyl-6-isopropylheptane
B) 2-isopropyl-4,5-dimethylheptane
C) 3,4,6,7-tetramethyloctane
D) 1,2-diethyl-3,6,7-trimethylheptane
E) 2,3,5,6-tetramethyloctane