400
Which sentence is correct?
(1) In my schoolbag I've got a pencil, a pens, and a snack.
(2) In my schoolbag I've got a pencil, a pens and a snack.
(3) In my schoolbag I've got a pencil, some pens and a snack.
(4) In my schoolbag I've got a pencil, some pens, and a snack.
(3) In my schoolbag I've got a pencil, some pens and a snack.