Discussion

Match List-I and List-II and select the correct answer using the codes given below :

List-I	List-II
(a) Lorenz curve	(1) A synthetic graph which is a combination of graphs and diagrams.
(b) Hydrographs	(2) The stage-discharge curve for any channel
(c) Ergograph	(3) Simple graphical method for comparing distribution on two-dimensional surface.
(d) Rating curve	(4) Flow rate of streams as a function of time.

Answer: A

The correct matching is a-3, b-4, c-1, d-2.

The Lorenz curve compares a distribution with perfect equality on a two-dimensional graph.
A hydrograph shows the flow rate of a stream as a function of time.
An ergograph is a synthetic graph combining graphs and diagrams, for example of climate and the farming calendar.
A rating curve is the stage-discharge curve of a channel.

Option B gives hydrographs the rating curve's meaning, and options C and D misplace the Lorenz curve.

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