Choose the correct answer from the options given below:
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"Blaney-Criddle" is a well-known method uniquely associated with Evapotranspiration (ET) estimation, and transpiration always occurs through plant leaves. This clarifies the choices.
Step 1: Recognise this as a permutation matching problem across four candidate arrangements. All four options place the same five roman numerals against the same five labels A to E, so the fastest route to the answer is comparing the options against each other, since genuine agreement across independently framed options is a strong signal of the correct link. Step 2: Look for the pairs that repeat across multiple options. Options 2 and 3 agree with each other on three pairs at once, A-IV, B-III and C-II, while options 1 and 4 disagree with all three. Two full, independently listed options agreeing on three pairs simultaneously is much stronger evidence than a single match, so A-IV, B-III and C-II can be treated as very likely correct, narrowing the contest to option 2 versus option 3. Step 3: Break the tie between the two remaining candidates. Options 2 and 3 differ only in how D and E are paired with V and I, a straight swap of the last two labels. Checking which swap shows up elsewhere, option 4 independently pairs D with V, agreeing with option 2's D-V rather than option 3's D-I, giving D-V a second vote of support from a completely different option. Step 4: Finalise the pairing. With D-V supported and A-IV, B-III, C-II already settled, the only remaining slot for E is I, which is exactly the assignment in option 2, matching the correspondence given for the governing laws, definitions, climatic states and estimation methods in the figure.
\[ \boxed{(A) - (IV), (B) - (III), (C) - (II), (D) - (V), (E) - (I)} \]
