Recently, there has been a concern over the short supply of a group of elements called 'rare earth

metals'. Why?

• 1. China, which is the largest producer of these elements, has imposed some restrictions on their export.
• 2. Other than China, Australia, Canada and Chile, these elements are not found in any country.
• 3. Rare earth metals are essential for the manufacture of various kinds of electronic items and there is a growing demand for these elements.

Which of the statements given above is/are correct?