The numerical question that could be asked for this question is the number of productions after removing **unit productions** and **$\epsilon$ productions.**

For removing $\epsilon$ productions, first, check all the nullable variables. By nullable variables I mean the variables which can lead you to $\epsilon$.

So, in this question **Nullable_Variables** = $\{A,B\}$

Now in every production on the RHS, write those productions **WITH** and **WITHOUT** Nullable variables (all possible combinations).

For making sure you don’t miss any case, you can follow this method –

$S \to ABAC$

$ABAC$

$000C = C$

$001C = AC$

$010C = BC$

$011C = BAC$

$100C = AC$

$101C = AAC$

$110C = ABC$

$111C = ABAC$

See that $AC$ is repeated so skip the repeated one in final answer.

For removing unit productions simply replace $S \to C$ with $S \to d$.