How many sentences among following are wrong about prolactin:-
(A)It is secreted by both the anterior pituitary and the placenta
(B)It cause production of milk and ejection of milk from mammary glands
(C)Hyper prolactenaemia cause adverse effect on reproductive function in both male and female
(D) Receptors of prolactin are found in cell membrane and cytoplasm.

Options

A. 2
B. 3
C. 4
D. 1

Explanation

To determine how many sentences are wrong about prolactin, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A**: "It is secreted by both the anterior pituitary and the placenta."
- **Analysis**: This statement is correct. Prolactin is primarily secreted by the anterior pituitary gland, and during pregnancy, it is also secreted by the placenta.
- **Conclusion**: This statement is **correct**.

2. **Statement B**: "It causes production of milk and ejection of milk from mammary glands."
- **Analysis**: This statement is partially incorrect. Prolactin is responsible for the production of milk (lactogenesis) and the development of mammary glands, but it does not cause the ejection of milk. The ejection of milk is primarily the function of oxytocin.
- **Conclusion**: This statement is **incorrect**.

3. **Statement C**: "Hyperprolactinemia causes adverse effects on reproductive function in both male and female."
- **Analysis**: This statement is correct. Hyperprolactinemia, which is an elevated level of prolactin, can lead to infertility and other reproductive issues in both males and females.
- **Conclusion**: This statement is **correct**.

4. **Statement D**: "Receptors of prolactin are found in cell membrane and cytoplasm."
- **Analysis**: This statement is correct. Prolactin is a peptide hormone, and its receptors are located on the cell membrane. While some receptors may be found in the cytoplasm, the primary action occurs through membrane-bound receptors.
- **Conclusion**: This statement is **correct**.

### Summary of Findings:
- **Correct Statements**: A, C, D
- **Incorrect Statements**: B

### Final Answer:
Out of the four statements, **only one statement (B) is incorrect**. Therefore, the answer to the question is that **1 statement is wrong about prolactin**.

---