A syndrome is characterized by the furrowed tongue , characteristics palm creases , mental retardation and short-statured with a small round head. It is due to the anomaly of which of the following chormosomes ?

Options

A. X
B. Y
C. 18th
D. `21^(st)`

Answer

To solve the question regarding the syndrome characterized by a furrowed tongue, characteristic palm creases, mental retardation, and short stature with a small round head, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Symptoms**: The symptoms provided in the question include:
- Furrowed tongue
- Characteristic palm creases
- Mental retardation
- Short stature with a small round head

2. **Recognize the Syndrome**: These symptoms are indicative of Down syndrome, which is also known as Trisomy 21.

3. **Understand Chromosomal Abnormalities**: Down syndrome is caused by the presence of an extra chromosome. In this case, it is the 21st chromosome that is affected.

4. **Determine the Chromosome Involved**: Since Down syndrome is characterized by an extra copy of chromosome 21, it is essential to conclude that the anomaly is specifically related to this chromosome.

5. **Select the Correct Answer**: Based on the analysis, the correct answer to the question is the 21st chromosome.

### Final Answer:
The syndrome is due to the anomaly of the **21st chromosome**.

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