**Ans - a,b, **LFollow may be different but RFollow and Follow will be same

Consider a Grammar -

$S \rightarrow AB$

$A \rightarrow a$

$B \rightarrow b$

Now only string derivable is $\{ ab \}$.

Let's find Follow(A) in all cases :

**Follow(A)** - set of terminals that can appear immediately to the right of non-terminal $A$ in some "sentential " form

$S \rightarrow AB \rightarrow Ab \rightarrow ab$

Here, we notice only '$b$' can appear to the right of $A$.

Follow$(A) = \{ b \}$

**LFollow(A)** - set of terminals that can appear immediately to the right of non-terminal $A$ in some "left sentential" form

$S \rightarrow AB \rightarrow aB \rightarrow ab$

Here, we notice no terminal can appear to the right of $A$.

LFollow$(A) = \{\}$

**RFollow(A)** - set of terminals that can appear immediately to the right of non-terminal $A$ in some "right most sentential" form

$S \rightarrow AB \rightarrow Ab \rightarrow ab$

Here, we notice only '$b$' can appear to the right of $A$.

RFollow$(A) = \{ b \}$