The Water (Prevention and Control of Pollution) Act was enacted in 1974 to regulate water pollution, and the Air (Prevention and Control of Pollution) Act was enacted in 1981 to control air pollution. These acts established Pollution Control Boards to enforce environmental standards.
| List I (Genetic Disorders) | List II (Genetic Alteration) | ||
| A | Down syndrome | I | Gain of X-chromosome |
| B | Klinefelter's syndrome | II | Loss of X-chromosome |
| C | Turner's syndrome | III | Trisomy of chromosome 21 |
| D | Cri du chat syndrome | IV | Deletion of small terminal portion of chromosome 5 |
Choose the correct answer from the options given below: