The IUPAC name for the following compound is:

A

3-methyl-4-(1-methylprop-2-ynyl)-1-heptene

B

3, 5-dimethyl-4-propylhept-6-en-1-yne

C

3, 5-dimethyl-4-propyl hept-1-en-6-yne

D

3-methyl-4-(3-methylprop-1-enhyl)-1-heptyne