Radial, tetrarch, cambial ring between xylem and phloem at later stages: Indicates a dicot root with a tetrarch xylem arrangement and cambial activity, matching (ii) T.S of dicot root.
Conjoint, open and endarch: Refers to dicot stems with vascular bundles that are open (with cambium) and endarch (phloem outside xylem), matching (iv) T.S of dicot stem.
Radial, Polyarch, large pith without cambial ring: Typical of monocot roots with multiple xylem and phloem strands and a large pith, matching (iii) T.S of monocot root.
Conjoint, closed with sclerenchymatous bundle sheath: Characteristic of monocot stems with closed bundles (no cambium) and a sclerenchymatous sheath, matching (i) T.S of monocot stem.
Matching Analysis:
(a) Radial, tetrarch, cambial ring → (ii) T.S of dicot root
(b) Conjoint, open and endarch → (iv) T.S of dicot stem
(c) Radial, Polyarch, large pith → (iii) T.S of monocot root
(d) Conjoint, closed with sclerenchymatous bundle sheath → (i) T.S of monocot stem
Option Analysis:
(1) a - ii, b - iv, c - iii, d - i: Matches the characteristics correctly. Correct.
(2) a - iii, b - iv, c - i, d - ii: Incorrect for 'a' and 'c'.
(3) a - i, b - ii, c - iii, d - iv: Incorrect for 'a' and 'b'.
(4) a - ii, b - iii, c - iv, d - i: Incorrect for 'b' and 'c'.
Conclusion: Option (1) correctly matches the vascular bundle characteristics with their transverse sections.
