The diagrams illustrate experiments about the rusting of iron. A student made the following predictions. 1. The iron nails rust in tube P. 2. The iron nails do not rust in tube Q. 3. The iron nails do not rust in tube R. Which of these predictions are correct?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only