Which of the following statements is not valid C$++$ code?

Group of answer choices

C$.$ float num$1=$ &ptr$2$;

E$.$ A$,$ B$,$ and C statements are invalid.

D$.$ A$,$ B$,$ and C statements are valid.

B$.$ int ptr $=$ &num$1$;

A$.$ int ptr $=$ int $*$num$1$;