J's answer to Germaine's Junior College 2 H3 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
J
J's answer
1024 answers (A Helpful Person)
1st
Benzene isomers include : fulvene, prismane, 1,5-hexadien-3-yne, benzvalene
The rest : generally no.