Select the number of the punctuation error in the following sentence:

My sister is very confident, 1 energetic, 2 and friendly3 and she makes friends wherever she goes. 4

1

2

3

4

I'd say that the number of the punctuation error in this sentence is 2, because you don't have to write and there as well.

It should be like this:

My sister is very confident, energetic, friendly, and she makes friends wherever she goes.