- Omega-3 fatty acids are found in fish liver oils, making them a match with Option II (Fish liver oils).
- Fish guano is a type of scrap fish, which makes it match with Option I (Scrap fish).
- Shagreem refers to the dried skin of sharks, which matches with Option IV (Dried skin of sharks).
- Isinglass is made from the air bladders of catfishes, matching with Option V (Air bladders of catfishes).
Thus, the correct answer is Option A: A-II, B-I, C-IV, D-V.