What is the correct name for the following compound: 3-propilhexa-1,4-dieno?

The longest chain containing the double bond has six carbons.
The double bond is located between carbons 1 and 4.
The compound has a propyl group attached to carbon 3.
a) 1-propil-4-hexen-6-ino
b) 3-propilhex-1-en-4-ino
c) 3-propilhexa-1,4-dieno
d) 4-propil-1-hexen-6-ino