Which of the following are correctly matched?1. Viena : Protection convention : of ozone layer2. Stockholm : Hazardous wastes convention : and their disposal3. Rotterdam : Hazardous convention : chemicals4. Basel : persistent organic convention : pollutions

• A. 1 and 2
• B. 1 and 3
• C. 2, 3 and 4
• D. 1, 2 and 4