Choose the correct answer from the options given below:
Show Hint
Remember:
- "Hyeto" means rain (Hyetograph = Rain vs time).
- "Hydro" means water flow (Hydrograph = River flow vs time).
- "Mass curve" always plots cumulative or accumulated values against time.
Step 1: Look for any pairing that all four options agree on. Checking every option side by side shows that all four, without exception, pair D with I. When every candidate answer agrees on one specific pairing, that pairing can be treated as settled with very high confidence, regardless of which option is fully correct. Step 2: Recognise that agreement between options is only a first pass filter, not a final proof. For the remaining labels, three of the four options place B against III, yet the confirmed correct option places B against V instead, showing that simple majority agreement can be misleading once you move past a pairing every option shares. Beyond the universally shared D-I pairing, the remaining links have to be settled by the actual definitions in the figure rather than by counting votes. Step 3: Apply the underlying logic of the hydrological plots being matched. The labels stand for different hydrological plots and curves, each defined by what is plotted on its axes, against time in some cases and against percentage of time or frequency in others, so the correct pairing has to place each named curve next to the axis definition that actually belongs to it. Carrying that definition by definition check through, while keeping D-I fixed, gives A-II, B-V, C-IV and E-III. Step 4: State the confirmed combination. Putting all five settled pairs together gives the full matching.
\[ \boxed{(A) - (II), (B) - (V), (C) - (IV), (D) - (I), (E) - (III)} \]
