These are a pen and a book.

[pedro8686]

Hello.
Can I say the sentence when pointing these things/people?
Could somebody please tell me that?

These are a pen and a book.

or

These are Mike and Mary.

[Soup]

Singular
This is a pen and a book.
This is Mike and Mary.

Plural
These are pens and books.
These people are Mike and Mary.

[sitifan]

1. This is a pen and some books.
2. These are a pen and some books.
Which of the above sentences is correct?