Step 1: Concept
Distinctive features of gymnosperm taxa.
Step 2: Meaning
Each gymnosperm group has unique reproductive or structural features.
Step 3: Analysis
Absence of Archegonia (A): Gnetum (II) lacks archegonia, unlike most other gymnosperms.
Antherozoids with Cilia (B): Cycas (IV) has motile, multiflagellate antherozoids.
Resin duct (C): Pinus (I) has prominent resin ducts.
Aril (D): Taxus (III) produces a fleshy aril surrounding the seed.
Step 4: Conclusion
Correct matching: A-II, B-IV, C-I, D-III.
Final Answer: (C)