For a pure substance that expands on freezing, which of the following statement(s) is/are $\textsf{CORRECT}$?
- Temperature of the liquid phase can be lower than the temperature at the triple point
- Critical pressure is equal to the pressure at the triple point
- Highest pressure at which the vapour phase can exist is the pressure at the triple point
- Highest temperature at which solid-liquid phase change can happen is the temperature at the triple point
