Select the correct IUPAC name for the following branched chain alkane.
Select the correct IUPAC name for the following branched chain alkane. 7,10-diethyl-2,6-dimethyl-6-(1-methylethyl)dodecane 10-ethyl-2,7-dimethyl-6-(1-methylbutyl)-7-propyldodecane 10-ethyl-2,7-dimethyl-6-(1-methylethyl)-7-propyldodecane 6,9-diethyl-4,6-dimethyl-5-(4-methylpentyl)undecane