An ideal contraceptive should be :-

Options

A. User-friendly
B. Easily available
C. Effective and reversible with no or least side effects
D. All of the above

Answer

### Step-by-Step Solution:

1. **Define Ideal Contraceptive**: An ideal contraceptive is a method or device used to prevent pregnancy that meets certain criteria for effectiveness and safety.

2. **User-Friendly**: The contraceptive should be easy to use, meaning that individuals can understand how to use it without needing extensive training or assistance.

3. **Easily Available**: It should be readily available in pharmacies or stores, ensuring that individuals can access it without difficulty.

4. **Effective**: The contraceptive must be reliable in preventing pregnancy, meaning it has a high success rate when used correctly.

5. **Reversible**: It should allow for the possibility of fertility to return after discontinuation, meaning individuals can conceive again if they choose to.

6. **No or Least Side Effects**: The ideal contraceptive should have minimal side effects to ensure it does not adversely affect the user's health.

7. **Cost-Effective**: It should be affordable so that individuals from various economic backgrounds can access it without financial strain.

8. **Protection Against STDs**: Ideally, it should also provide protection against sexually transmitted diseases (STDs), adding an extra layer of safety for users.

9. **Conclusion**: Based on these criteria, the correct answer to the question is "all of the above," as an ideal contraceptive should encompass all these characteristics.