30. Which of the following names is a correct one? (A) 3,5-dichloropentane (B) 2-bromo-1-chloro-4,4-dimethylnonane (C) cis-1,3-dimethylpropane (D) 1,1-dimethyl-2,2-diethylbutane (E) 1-chloro-2,4-methyl-3-propylcyclohexane