| List I Pathogen/Infective stage | List II Mode of transmission | ||
| A. | Trichomonas vaginalis | I. | Aerial transmission |
| B. | Metacestodes of Echinococcus multilocilaris | II. | Sexual transmission |
| C. | Mycobacterium tuberculosis | III. | Direct contact |
| D. | Lice and mites | IV. | Tropic transmission |
| 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: