Question

Which material is called as liquid gold give brief introduction
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Answer 1

Answer:

Petroleum is called liquid gold. It is so called to imply its significance. It shows that the petroleum is as significant as gold and also tells us that it is as difficult as finding gold

Answer 2

Answer:

Petroleum is called liquid gold.

• It shows that the petroleum is as significant as gold and also tells us that it is as difficult as finding gold.