Arrange the following in correct sequence: -
(a) Crude mineral oil is drilled from oilfields.
(b) Organic material gets buried in layers of sedimentary rock
(c) By products are formed- Chemicals, Fertilizers, drugs, etc.
(d) It is then refined in oil refineries to produce petrol, diesel, etc.
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Answer:
b - 1
a- 2
d-3
c-4
is the correct answer
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