Which of the following minerals occur naturally mainly in combined form?
1. Aluminium
2. Gold
3. Calcium
4. Sodium

1, 2 and 3 only

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1 and 3 only

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2 and 4 only

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1, 3 and 4

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Solution

The correct option is D 1, 3 and 4
Elements which are reactive are usually present in combined form. Whereas metals which are inert are found in the native state. In the given options, gold is only inert metal.
Hence, option D is correct.

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