A plant has leaves that contain both green and white regions. Part of one leaf is covered with aluminium foil so that light cannot reach it. The plant is then kept under a lamp for 24 hours. After this period, discs are taken from the parts of the leaf indicated and then tested using iodine solution. Which leaf discs will turn blue-black when iodine solution is added?
- AW and X
- BX only
- CY and Z
- DY only