(A) : Biogas plants are usually build in rural areas. Cattle dung is available in large quantities.A. If both (A) and (R) are true and (R) is the correct explanation of (A).B. If both (A) and (R) are true but (R) is not the correct explanation of (A).C. If (A) is true but (R) is false.D. If both (A) and (R) are false.

(A) : Biogas plants are usually build in rural areas. Cattle dung is a

1.	(A) : Biogas plants are usually build in rural areas. Cattle dung is available in large quantities.A. If both (A) and (R) are true and (R) is the correct explanation of (A).B. If both (A) and (R) are true but (R) is not the correct explanation of (A).C. If (A) is true but (R) is false.D. If both (A) and (R) are false.
Answer» Correct Answer - A

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Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer. Biogas, Citric acid, Penicillin and Curd
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