Which are true about rules in right$-$regular grammars?

$1$ Point

Grading comment:

Choice $1$ of $4$: The left$-$hand side can contain multiple symbols.

Choice $2$ of $4$: The left$-$hand side contains only variables.

Choice $3$ of $4$: The right$-$hand side contains only one variable, which occurs in the rightmost position.

Choice $4$ of $4$: The right$-$hand side contains only one terminal $($symbol from the alphabet$),$ which occurs in the rightmost position.