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What do these five countries have in common: Nicaragua, the Philippines, Bolivia, Liechtenstein, Saudi Arabia?

  1. They are all located at an altitude above 1400 km.
  2. They are the only producers of zirconium
  3. They are all named after historic personalities
  4. They all use the US dollar as their unit of currency

Answer

The correct answer is C) They are all named after historic personalities.

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