Following are the estimated source of revenue of the Union Budget 2020-21. Match List-I with List-II and select the correct answer from the codes given below : List - I (Source) List - II (Percentage of Revenue) A. Corporate Tax 1. 17 percent B. Income Tax 2. 18 percent C. Customs 3. 7 percent D. Central Excise 4. 4 percent Codes : A B C D