Insitu theory and drift theory are related to the (A) Origin of petroleum oil (B) Origin of coal (C) Coalification (D) Variation of coal quality with depth

Insitu theory and drift theory are related to the
(A) Origin of petroleum oil
(B) Origin of coal
(C) Coalification
(D) Variation of coal quality with depth
by

1 Answer

Answer :

(B) Origin of coa
by

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