She is not only beautiful, but also smart ---not ok because of the comma whim is not required when a fanboys connects just two items.
She is not only beautiful but also smart ---Not only adjective but also adjective -- correct
She is not only beautiful, but she is also smart --not only adjective but she is also --- not parallel.
Q2
Not only she is smart, but also beautiful--not only noun but also adjective is not ok
Not only she is smart but also beautiful --same as in A
Not only
...
She is not only beautiful but also smart ---Not only adjective but also adjective -- correct
She is not only beautiful, but she is also smart --not only adjective but she is also --- not parallel.
Q2
Not only she is smart, but also beautiful--not only noun but also adjective is not ok
Not only she is smart but also beautiful --same as in A
Not only
...
