1.

Assertion (A): Petroleum is called Black gold Reason (R): Due to its great commercial importance, petroleum is called black gold.

A.  A is correct and R is the correct explanation of A.
B.  A is correct and R is not the correct explanation of A
C.  Biogas 
D.  A is wrong and R is correct.
Answer» B.  A is correct and R is not the correct explanation of A


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