In reference to piezoelectric effect, consider the following statements.
- In the piezoelectric effect, a body develops an electric current when it is squeezed.
- Quartz is the most famous piezoelectric crystal.
- Quartz is used in analog wristwatches and clocks, cigarette lighters, electric guitars, TV remote controls, etc.
- Piezoelectric effect is observed in all three states- solid, liquid and gas.
Which of the above statements is/are correct