Which of the following contraceptive methods correctly matches with its mode of action ?

Options

A. `{:("Contraceptive method Mode of action"),("Tubectomy Makes the uterus unsuitable for implantation"):}`
B. `{:("Contraceptive method Mode of action"),("Oral pills Inhibit ovulation and implantation"):}`
C. `{:("Contraceptive method Mode of action"),("Diaphragms Spermicidal adn increases phagocytosis of sperms within the uterus"):}`
D. `{:("Contraceptive method Mode of action"),("IUDs Blocks gamete transport"):}`

Explanation

To determine which contraceptive method correctly matches with its mode of action, we will analyze each method provided in the question.

### Step-by-Step Solution:

1. **Identify the Contraceptive Methods and Their Modes of Action**:
- Tubectomy
- Oral Pills
- Diaphragms
- IUDs (Intrauterine Devices)

2. **Analyze Each Method**:
- **Tubectomy**: This is a surgical procedure where the fallopian tubes are tied. Its primary purpose is to block the transport of gametes (egg and sperm), preventing fertilization.
- **Mode of Action**: Incorrectly matched (it does block gamete transport, but the question asks for correct matches).

- **Oral Pills**: These are hormonal contraceptives taken orally. They work primarily by inhibiting ovulation and preventing the implantation of a fertilized egg in the uterus.
- **Mode of Action**: Correctly matched (they inhibit ovulation and implantation).

- **Diaphragms**: These are barrier methods that prevent sperm from entering the uterus by covering the cervix.
- **Mode of Action**: Incorrectly matched (they do prevent sperm entry, but this is not a complete description of their action).

- **IUDs**: These are devices inserted into the uterus. They can work by creating a hostile environment for sperm, increasing phagocytosis, and preventing implantation.
- **Mode of Action**: Incorrectly matched (they do increase phagocytosis and have a spermicidal effect).

3. **Conclusion**: After analyzing all methods and their respective modes of action, we find that the only correctly matched option is the **Oral Pills**, which inhibit ovulation and implantation.

### Final Answer:
The contraceptive method that correctly matches with its mode of action is **Oral Pills**.