In .............the egg is first fertilized outside the body and then it is inserted into the oviduct,

Options

A. GIFT
B. ZIFT
C. ICSI
D. AI

Answer

To solve the question "In .............the egg is first fertilized outside the body and then it is inserted into the oviduct," we need to identify the correct reproductive technique from the given options.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a reproductive technique where fertilization occurs outside the female body, followed by the insertion of the fertilized egg (zygote) into the oviduct.

2. **Identifying the Techniques**: The options provided in the question are:
- A) GIFT (Gamete Intra Fallopian Transfer)
- B) ZIFT (Zygote Intra Fallopian Transfer)
- C) ICSI (Intracytoplasmic Sperm Injection)
- D) AI (Artificial Insemination)

3. **Analyzing Each Technique**:
- **GIFT**: In this method, both the egg and sperm are placed together in the fallopian tube, where fertilization occurs inside the body. Thus, this does not fit the requirement of fertilization outside the body.
- **ZIFT**: In this technique, the egg is fertilized outside the body (in a lab), and then the zygote (or early embryo) is transferred into the fallopian tube. This matches the requirement of the question.
- **ICSI**: This is a specialized procedure where a single sperm is injected directly into an egg, and while fertilization occurs outside the body, the zygote is not specifically transferred to the oviduct.
- **AI**: This method involves the introduction of sperm into the female reproductive tract, but fertilization occurs inside the body, so it does not meet the criteria.

4. **Conclusion**: Based on the analysis, the correct answer is **B) ZIFT (Zygote Intra Fallopian Transfer)**, as it is the only technique where fertilization occurs outside the body and the fertilized egg is then inserted into the oviduct.

### Final Answer:
The answer is **B) ZIFT**.