| I. Trapa |
| II. Pisum |
| III. Castanea |
| IV. Nicotiana |
A) II, IV, III, I
B) III, IV, II, I
C) IV, III, I, II
D) l, IV, II, III
Correct Answer: D
Solution :
Only one xylem strand occurs in the slender root of the hydrophyte Traps natans. In Nicotiana the roots are diarch. In Pisum the root is triarch. In Castanea the root is tetrarch.
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