Step 1: Core Idea:
This question asks us to link nutrients/constituents with crops that are exceptionally rich in them.
Step 2: Breakdown:
Let's match each constituent to its primary source:
\[\begin{array}{rl} \bullet & \text{(A) Beta Carotene: Precursor to Vitamin A. (II) Mango is a very rich source of beta carotene, providing its orange-yellow color. } \\ \bullet & \text{(B) Ascorbic Acid: Vitamin C. (IV) Barbados Cherry (*Malpighia emarginata*) is one of the world's richest natural Vitamin C sources. } \\ \bullet & \text{(C) Riboflavin: Vitamin B2. (III) Bael (*Aegle marmelos*) fruit pulp is extremely rich in riboflavin. } \\ \bullet & \text{(D) Niacin: Vitamin B3. (I) Fig is a good niacin source from the provided choices. } \\ \end{array}\]The correct matches are: A \(\rightarrow\) II, B \(\rightarrow\) IV, C \(\rightarrow\) III, D \(\rightarrow\) I.
Step 3: Answer:
The correct match corresponds to option 2.