Step 1: Understanding the Concept:
This question tests knowledge of common names of ornamental plants.
Step 2: Detailed Explanation:
Autumn queen (A):
Common name for Chrysanthemum (II).
Thus, A matches with II.
Sword lily (B):
Common name for Gladiolus (I).
Thus, B matches with I.
Pot marigold (C):
Common name for Calendula (IV).
Thus, C matches with IV.
Straw flower (D):
Common name for Helichrysum (III).
Thus, D matches with III.
Step 3: Final Answer:
Thus, the correct matching is A-II, B-I, C-IV, D-III, which corresponds to option (D).
[0.5cm]