Which of the given Boolean equations is in Product$-$of$-$Sums $($POS$)$ form?

The following multiple$-$choice options contain math elements, so you may need to read them in your screen reader's $$reading$$ or $$browse$$ mode instead of $$forms$$ or $$focus$$ mode.

Choice $1$ of $4$:

$$

$($

$$

$,$

$$

$,$

$$

$)$

$=$

$$

$$

$($

$$

$+$

$$

$)$

$+$

$$

$$

$($

$$

$$

$$

$+$

$$

$)$

F$($A$,$B$,$C$)=$A

$$

$($B$+$C$)+$B

$$

$($AC

$$

$+$B$)$

Choice $2$ of $4$:

$$

$($

$$

$,$

$$

$,$

$$

$)$

$=$

$($

$$

$$

$+$

$$

$+$

$$

$$

$)$

$($

$$

$$

$+$

$$

$+$

$$

$)$

$($

$$

$+$

$$

$$

$)$

F$($A$,$B$,$C$)=($A

$$

$+$B$+$C

$$

$)($A

$$

$+$B$+$C$)($A$+$B

$$

$)$

Choice $3$ of $4$:

$$

$($

$$

$,$

$$

$,$

$$

$)$

$=$

$$

$$

$$

$+$

$$

$+$

$$

$$

$$

$$

F$($A$,$B$,$C$)=$A

$$

B$+$A$+$ABC

$$

Choice $4$ of $4$:

$$

$($

$$

$,$

$$

$,$

$$

$)$

$=$

$($

$$

$$

$+$

$$

$+$

$$

$)$

$($

$$

$$

$$

$+$

$$

$$

$)$

F$($A$,$B$,$C$)=($A

$$

$+$B$+$C$)($AB

$$

$+$BC$)$