An alkene having molecular formula C7H14 was subjected to ozonolysis in the presence of zinc dust. An equimolar amount of the following two compounds was obtained

The IUPAC name of the alkene is
(a) 3, 4-dimethyl-3-pentene
(b) 3,4-dimethyl-2-pentene
(c) 2,3-dimethyl-3-pentene
(d) 2, 3-dimethyl-2-pentene