Qr code is more developed than barcode​

While a barcode only holds information in the horizontal direction, a QR code does hold information in both horizontal and vertical directions. Due to this, a QR code holds hundreds of times more information than a barcode.

With that being said they have different purposes, and there about the same developed as each other, unless you count how much information they can store.

idk

sorry.

but i may be able to identify that is not you < 3

1. b

2. c

3. b

4. a

5. b