Assertion: Agricultural output increased several times after introducing of DDT
Reason:DDT was the first insecticide used on a wide scale

Options

A. If both assertion and reason are true and reason is the correct explaination of assertion
B. If both assertion and reason are true but reason is not correct explaination of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

A

Explanation

DDt or dichloro-diphenyl trichloroethane was the first important synthetic pesticide(organochlorine)Discovered in 1939 by a Swiss chemist paul Muller.It was toxic to wide range of insect pests("broad spectrum")yet appeared to have low toxicity to mammals It was peristent i.e. didn't break down rapidly in the environment,So that it didn't have to be reapllied often.DDT was so effective at killing pests and thus boosting crop yields and was so inexpensive to make that its use quickly spread over the globe.Farmers used more and more DDT throughout the 1950s and 1960s to get an increased yield of crop.