Question

*Which of the following is also known as 'black gold'?*

1️⃣ CNG
2️⃣ Natural Gas
3️⃣ Coal
4️⃣ Petroleum​

Answer 1

4️⃣ Petroleum

I hope it will help you please give thanks

Answer 2

Answer:

4.Petroleum

Explanation:

because when crude oil is extracted from the land , it is black in colour and is also very rare