In the statement SELECT $*$ FROM PRODUCT WHERE P$\_$CODE$=1546-$QQ$2,$ we use quotation marks for $1546-$QQ$2$ is because:

Group of answer choices

Quotation marks are optional. We do not need to use it$.$

P$\_$Code is string

There is a $-$ in the P$\_$Code

P$\_$Code is a combination of number and characters