Answer the questions based on the following information.
The following table gives the urban population of a country and the percentages of total population in rural and urban areas as recorded in the 10-years censuses during 1901-81.
Table 1. Urban and rural population 1901-1981
The smallest rate of increase in urban population in a decade during 1921-1961 occurred in
Let's solve the options one by one ,
Option A :Rate of increase of urban population during 1951-61 = $$\dfrac{79-62}{62}$$ = 0.274
Option B :Rate of increase of urban population during 1941-51 = $$\dfrac{62-44}{44}$$ = 0.409
Option C :Rate of increase of urban population during 1931-41 = $$\dfrac{44-33}{33}$$ = 0.33
Option D :Rate of increase of urban population during 1921-31 = $$\dfrac{33-28}{28}$$ = 0.1785
Among the above values smallest rate of increase was during 1921-31
Hence D is the correct answer.
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