Obesity with mental retardation is seen in ?
**Core Concept**
Obesity with mental retardation is a feature of certain genetic syndromes, which involve a combination of intellectual disability and physical characteristics. This condition is often associated with genetic mutations affecting various bodily systems, including metabolism and growth.
**Why the Correct Answer is Right**
The correct answer is Prader-Willi syndrome (PWS), a genetic disorder characterized by severe hunger and food-seeking behavior, leading to obesity. PWS is caused by a deletion or inactivation of genes on chromosome 15, which affects the hypothalamus, a region of the brain that regulates appetite and metabolism. This results in insatiable hunger, poor satiety, and subsequent obesity. **Option A:** is incorrect because it does not accurately describe the condition.
**Why Each Wrong Option is Incorrect**
**Option B:** does not directly associate with obesity and mental retardation.
**Option C:** is incorrect as it does not describe the condition accurately.
**Option D:** does not accurately describe the condition associated with obesity and mental retardation.
**Clinical Pearl / High-Yield Fact**
Prader-Willi syndrome is characterized by a range of physical features, including short stature, hypotonia, and a distinctive facial appearance. It is essential to recognize the condition early, as it can lead to significant morbidity and mortality if not managed appropriately.
**Correct Answer:** A. Prader-Willi syndrome.