Preference to longest carbon chain or double bond?
Above structure and its nomenclature is given in my book. However, I suspect it is wrong because the Carbon chain of 8 instead of 7 is available. So my question is do we give preference to double bond over the number of carbon in a chain during nomenclature?
I found this question here but it only makes me more confuse as its answer states that we give preference to the carbon chain. So is my book outdated(which is possible) or is there any other rule which I am unaware of?
Will this question be well received here? I am a bit hesitant to ask this question.