Choose three CORRECT sentences : 1)she is so good girl 2)It is such a great idea 3) I am so tired 4) She is such beautiful

Choose three CORRECT sentences : 1)she is so good girl 2)It is such a great idea 3) I am so tired 4) She is such beautiful 5) they are such a cute couple 6) I am so happy mother.

Correct sentences are:

1) she is so good girl;

3) I am so tired;

6) I am so happy mother.