Assertion :- Gynaecomastia is observed in Turner's syndrome.
reason :- Such a disorder is caused due to the presence of extra copy of X-chromosome.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that gynecomastia is observed in Turner’s syndrome. We need to evaluate if this statement is true or false. Turner’s syndrome is a genetic condition that affects females, characterized by the presence of a single X chromosome (45 chromosomes in total, with a karyotype of 45,X).

2. **Understanding the Reason**: The reason given is that this disorder is caused due to the presence of an extra copy of the X chromosome. We need to analyze this statement as well. Turner’s syndrome is not caused by an extra X chromosome; rather, it is caused by the absence of one X chromosome.

3. **Identifying the Correct Condition**: Gynecomastia (the development of breast tissue in males) is not a feature of Turner’s syndrome. Instead, it is commonly associated with Klinefelter syndrome, which is characterized by the presence of an extra X chromosome (47 chromosomes, XXY).

4. **Conclusion**: Since both the assertion and the reason are incorrect (gynecomastia is not observed in Turner’s syndrome, and Turner’s syndrome is not caused by an extra X chromosome), we conclude that both statements are false.

5. **Final Answer**: Therefore, the correct option is that both the assertion and reason are false.

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