The function of copper-T is to prevent:

Options

A. Fertilisation
B. Egg maturation
C. Ovulation
D. none

Answer

### Step-by-Step Solution:

1. **Understanding Copper-T**: Copper-T is a type of intrauterine device (IUD) used for birth control. It is shaped like a "T" and is made from plastic and copper.

**Hint**: Remember that Copper-T is a device inserted into the uterus for contraception.

2. **Function of Copper-T**: The primary function of Copper-T is to prevent pregnancy. It does this by being placed inside the female's uterus.

**Hint**: Think about how the placement of the device in the uterus relates to its function in preventing pregnancy.

3. **Mechanism of Action**: Copper-T releases copper ions, which play a crucial role in its contraceptive effect. These copper ions are toxic to sperm, effectively killing them and preventing fertilization.

**Hint**: Focus on the role of copper ions in the mechanism of action of Copper-T.

4. **Conclusion**: Therefore, the function of Copper-T is to prevent fertilization by killing sperm cells, making it an effective form of contraception.

**Hint**: Summarize the key point: Copper-T prevents fertilization, not other processes like egg maturation or ovulation.

### Final Answer:
The function of Copper-T is to prevent fertilization.