• Cymbopogon flexuosus (East Indian Lemongrass) $\rightarrow$ (II) Oil: Aerial foliage and herbage are hydro-distilled to extract lemongrass essential oil, rich in citral ($75-85\%$).
• Glycyrrhiza glabra (Liquorice / Mulethi) $\rightarrow$ (IV) Underground stem: The dried stolons and subterranean rhizomes/roots yield glycyrrhizin, used for demulcent, anti-inflammatory, and expectorant actions.
• Plantago ovata (Isabgol) $\rightarrow$ (I) Husk: The dry seed husk (seed coat epidermis) contains mucilage, functioning as a bulk-forming laxative.
• Gymnema sylvestre (Gudmar / Madhunashini) $\rightarrow$ (III) Leaf: Dried foliage contains gymnemic acids, which temporarily suppress the sensation of sweetness and stimulate insulin secretion.
• Correct Combination: (A)-(II), (B)-(IV), (C)-(I), (D)-(III), matching Option 2.

Correct option: (2) (A) - (II), (B) - (IV), (C) - (1), (DB) - (Ill)

• Assertion (A) is True: Vetiver (Chrysopogon zizanioides, formerly Vetiveria zizanioides) thrives best in rich, deep, friable, well-drained sandy-loam to loamy soils with adequate moisture holding capacity.
• Reason (R) is True and Explains (A): Loamy soil offers loose physical texture that enables the massive, spongy, aromatic fibrous root network to penetrate vertically deep ($2-3\text{ m}$) into the subsoil. Furthermore, harvesting roots from friable loamy soil allows easy digging and lifting without breakage, preventing significant root and oil loss.
• Conclusion: Both (A) and (R) are true, and (R) is the correct explanation of (A) (Option 1).

Correct option: (1) Both (A) and (R) are true and (R) is the correct explanation of (A)