When an appellate court decision includes a dissenting opinion, what is the immediate effect of that dissenting opinion?

The dissenting opinion is only used in schools to teach students studying law.

The dissenting opinion will always eventually become effective, but not right away.

It is not the law that decides the issue between the parties, and nobody is required to follow it as precedent.

It is the law that decides the issue between the parties and must be followed as precedent.