Metadisocoidal placenta is found in

Options

A. Humans
B. Cow
C. Pig
D. Rabbit.

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Metadisocoidal Placenta":**
- The term "metadisocoidal placenta" refers to a specific type of placenta characterized by the presence of chorionic villi that are restricted to a disc-shaped area on the ventral side of the embryo.

2. **Identifying the Options:**
- The options provided are:
- A) Humans
- B) Cow
- C) Pig
- D) Rabbit

3. **Analyzing Each Option:**
- **Humans:** Humans have a metadisocoidal placenta, where the villi form a disc shape.
- **Cows:** Cows have a cotyledonary placenta, which is different from the metadisocoidal type.
- **Pigs:** Pigs also have a diffuse placenta, not metadisocoidal.
- **Rabbits:** Rabbits have a different type of placenta as well, known as a deciduate placenta.

4. **Conclusion:**
- Based on the analysis, the only option that corresponds to the metadisocoidal placenta is **A) Humans**.

5. **Final Answer:**
- Therefore, the correct answer is **option A: Humans**.

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