The diagram illustrates an experiment. After $30$ minutes, tests were done on the contents of the membrane bag and on the water in the beaker. Which row gives the test results?
- Abiuret test on water in the beaker: blue; biuret test on the contents of the bag: blue; pH of water in the beaker: $6.0$
- Bbiuret test on water in the beaker: blue; biuret test on the contents of the bag: purple; pH of water in the beaker: $5.5$
- Cbiuret test on water in the beaker: red; biuret test on the contents of the bag: purple; pH of water in the beaker: $7.0$
- Dbiuret test on water in the beaker: purple; biuret test on the contents of the bag: blue; pH of water in the beaker: $8.0$