| 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:
| List-1 (Period) | List-II (Event) | ||
| A | Carboniferous period | I | Origin of reptiles |
| B | Quaternary period | II | Origin of genus 'Homo' |
| C | Permian period | III | Origin of present-day insects |
| D | Devonian period | IV | Origin of tetrapods |
Choose the correct answer from the options given below