If d and w are both pointers, how many read operations occur in the following statement

$*$d $=**$w $+*$d;

Choice $1$ of $5$: $1$

Choice $2$ of $5$: more than $4$

Choice $3$ of $5$: $3$

Choice $4$ of $5$: $4$

Choice $5$ of $5$: If $d$ and $w$ are both pointers, how many read operations occur in the following statement

${?}^{**}d=***{*}_w+*{*}_d$;

$1$

more than $4$

$3$

$4$

$22$