The hydrocarbon with seven carbon atoms containing a neopentyl and a vinyl group is :

Question

$\begin{array}{1 1}\text{(1)2, 2-dimethyl-4-pentene} \\ \text{(2)Isopropyl-2-butene} \\ \text{(3)4, 4-dimethylpentene } \\ \text{(4)2, 2-dimethyl-3-pentene }\end{array} $