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Match List I with List II. List I (Substances) List II (Element Present) A. Ziegler catalyst I. Rhodium B. Blood pigment II. Cobalt C. Wilkinson catalyst III. Iron D. Vitamin B 12 IV. Titanium Choose the correct answer from the options given below.

1. A-II, B-IV, C-I, D-III
2. A-III, B-II, C-IV, D-I
3. A-II, B-III, C-IV, D-I
4. A-IV, B-III, C-I, D-II

Correct answer: A-IV, B-III, C-I, D-II

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