hCG is produced by

Options

A. Uterus and ovary
B. Carpus luteum and Graffian follicle
C. Trophoblasts and corpus albicans
D. Syncytiotrophoblastic cells of the placenta

Answer

To solve the question "hCG is produced by," we will analyze the options provided and identify the correct source of human chorionic gonadotropin (hCG).

### Step-by-Step Solution:

1. **Understanding hCG**:
- hCG stands for human chorionic gonadotropin, which is a hormone associated with pregnancy.
- It plays a crucial role in maintaining the corpus luteum during the early stages of pregnancy.

2. **Analyzing the Options**:
- **Option A: Uterus and Ovary**: While these organs are involved in reproductive processes, they do not produce hCG.
- **Option B: Corpus luteum and Graafian Follicle**: The corpus luteum produces progesterone, but it does not produce hCG. The Graafian follicle is involved in ovulation but does not produce hCG either.
- **Option C: Trophoblast and Corpus Albicans**: The trophoblast is part of the developing embryo and does produce hormones, but the corpus albicans is a degenerated form of the corpus luteum and does not produce hCG.
- **Option D: Syncytiotrophoblastic cells of the placenta**: This is the correct answer. The syncytiotrophoblast is a layer of the placenta that produces hCG during pregnancy.

3. **Conclusion**:
- Based on the analysis, the correct answer is **D. Syncytiotrophoblastic cells of placenta**.

### Final Answer:
**D. Syncytiotrophoblastic cells of placenta**