Directions for: The questions consist of two statements each, printed as assertion and reason. While answering these questions you are required to choose any one of the following five responses A. If both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion. B. If both the Assertion and the Reason are true but the Reason is not a correct explanation of Assertion. C. If the Assertion is true but the Reason is false. D. If both the Assertion and the Reason are false. E. If Assertion is false but Reason is true.
Assertion: Agricultural output increased several times after introduction of DDT. Reason: DDT was the first insecticide used on a wide scale.A) A
B) B
C) C
D) D
E) E
Correct Answer: B
Solution :
DDT (Dichloro Diphenyl Trichloro Ethane) was first synthesized by a German graduate student in 1873. In 1939, Dr. Paul Muller rediscovered it. DDT is a broad spectrum and most famous pesticide of the world. In 1950, and 1960s farmers got high yield of crops by the use of DDT. Today DDT is banned due to its persistant and biomagnifying property and resistant mutant strain of property and resistant mutant strain of the pests.
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