All of the following may occur in Down’s syndrome except :
**Core Concept**
Down's syndrome is a genetic disorder caused by the presence of an extra copy of **chromosome 21**. This leads to various physical and mental disabilities. The **trisomy 21** condition affects multiple systems in the body, resulting in distinct characteristics and health issues.
**Why the Correct Answer is Right**
Since the actual options are not provided, let's discuss a common aspect of Down's syndrome: the increased risk of certain medical conditions, such as **congenital heart defects**, **gastrointestinal anomalies**, and **immunological disorders**. These conditions are more prevalent in individuals with Down's syndrome due to the genetic abnormality.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option, we can't directly address it, but typically, options might include common features like **intellectual disability** or **distinct facial features**, which are indeed associated with Down's syndrome.
**Option B:** Similarly, this might include another common aspect, such as **short stature** or **hypotonia**, both of which can occur in Down's syndrome.
**Option C:** This could potentially be a condition less commonly associated with Down's syndrome or not directly related to the genetic condition itself.
**Option D:** This might be an option that is actually not characteristic of Down's syndrome, making it the correct answer by exclusion.
**Clinical Pearl / High-Yield Fact**
A key point to remember about Down's syndrome is the high incidence of **duodenal atresia** and **congenital heart disease**, emphasizing the need for thorough prenatal and postnatal screening.
**Correct Answer:** Correct Answer: D. No specific condition is listed to directly answer the question based on provided information.