What does the new operator do in the following statement?

double$*$ num $=$ new double$[10]$;

Question $13$ options:

It allocates an array of size $10,$ and yields a pointer to the starting element.

It allocates enough memory for a double value and initializes it with $10.$

It allocates enough memory for $10$ pointers.

This is not a legal statement, it will generate a compiler error.