Which of the following contains an anti-progesterone preparation and used as emergency contraception?

Options

A. Mifepristone
B. Triquilar
C. LNG-20
D. Cyclofem

Answer

To solve the question regarding which option contains an anti-progesterone preparation and is used as emergency contraception, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Anti-Progesterone**:
- Anti-progesterone agents are substances that block the action of progesterone in the body. They are often used in emergency contraception to prevent pregnancy after unprotected intercourse.

2. **Identify the Options**:
- The options provided are likely to include various contraceptive methods or medications. In this case, we will analyze each option to determine which one contains an anti-progesterone preparation.

3. **Evaluate Each Option**:
- **Mifepristone**: This is a well-known anti-progesterone medication that is used in emergency contraception. It works by blocking progesterone receptors, preventing the implantation of a fertilized egg.
- **Tricolor**: This is a combined oral contraceptive that contains both estrogen and progesterone. It does not act as an anti-progesterone.
- **LNG 20 (Levonorgestrel)**: This is a hormonal emergency contraceptive but does not block progesterone; rather, it is a progestin that prevents ovulation.
- **Cyclofem**: This is a combination of estrogen and progesterone and is not an anti-progesterone.

4. **Conclusion**:
- Based on the evaluations, **Mifepristone** is the only option that contains an anti-progesterone preparation and is used as emergency contraception.

### Final Answer:
- The correct answer is **Mifepristone**.