Which of the following is a hormone releasing intra uterine device (IUD)?

Options

A. Vault
B. Multioad 373
C. LNG-20
D. Cervical cap

Answer

To determine which of the following is a hormone-releasing intrauterine device (IUD), let's analyze the options provided:

1. **Waltz**: This is not an IUD; it is a barrier method of contraception.
2. **Multiload 373**: This is a copper-releasing IUD, which does not release hormones.
3. **LNG-20**: This is a hormone-releasing IUD that contains the hormone progesterone.
4. **Cervical cap**: This is also a barrier method and not an IUD.

Based on this analysis, the correct answer is:

**LNG-20** is the hormone-releasing intrauterine device (IUD).

### Step-by-Step Solution:
1. **Identify the types of devices**: Understand the difference between hormone-releasing IUDs and other contraceptive methods.
2. **Examine each option**:
- **Waltz**: Recognize it as a barrier method.
- **Multiload 373**: Identify it as a copper-releasing IUD.
- **LNG-20**: Confirm it as a hormone-releasing IUD.
- **Cervical cap**: Acknowledge it as a barrier method.
3. **Select the correct option**: Based on the analysis, choose LNG-20 as the hormone-releasing IUD.