To solve the problem of identifying which option is an example of a Hormone releasing Intrauterine Device (IUD), let's review what is known about the given options:
Hormone-releasing IUDs work by thickening cervical mucus, which prevents sperm from reaching an egg, and by thinning the uterine lining, which makes it less suitable for implantation.
Hence, the correct answer is LNG 20, as it is specifically designed to release the hormone Levonorgestrel over time to prevent pregnancy.
| List - I (Period) | List - II (Population Growth Characteristics) | ||
| (A) | 1901 - 1921 | (I) | Period of Population Explosion |
| (B) | 1921 - 1951 | (II) | Gradually slowing down of growth rate |
| (C) | 1951 - 1981 | (III) | Period of steady Population Growth |
| (D) | 1981 - till present | (IV) | Stagnant or stationery phase of growth |