Match List-I with List-II and select the correct answer from the codes given below the lists: List-I List-II (Phenomenon) (Compounds) A. Acid Rain 1. Chlorofluoro-carbon B. Photochemical Smog 2. Carbon Monoxide C. Combination with Haemoglobin 3. Sulphur dioxide D. Depletion of Ozone Layer 4. Unsaturated Hydrocarbons A B C D