Deficiency of which element can lead to the syndrome of growth failure, anemia, and hypogonadism?
**Core Concept**
The question is testing knowledge on a specific nutritional deficiency that affects multiple bodily systems, including growth, hematopoiesis, and reproductive function. The underlying principle is the essential role of a particular element in various physiological processes.
**Why the Correct Answer is Right**
The correct answer is related to a deficiency of a specific element that is crucial for the synthesis of DNA, RNA, and proteins. This element is also vital for the proper functioning of the immune system and the maintenance of healthy skin, hair, and mucous membranes. A deficiency in this element can lead to impaired growth and development, anemia, and hypogonadism due to its role in the synthesis of sex hormones. The element in question is also involved in the regulation of gene expression, making it essential for proper cellular function.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not directly relate to the symptoms described. While it is a nutrient, its deficiency primarily affects the nervous system and does not lead to the specific combination of symptoms described.
* **Option B:** This option is incorrect because it is not directly involved in the synthesis of DNA, RNA, or proteins. Its deficiency primarily affects energy metabolism and does not lead to the specific combination of symptoms described.
* **Option C:** This option is incorrect because it is not directly involved in the regulation of gene expression or the synthesis of sex hormones. Its deficiency primarily affects the cardiovascular system and does not lead to the specific combination of symptoms described.
**Clinical Pearl / High-Yield Fact**
A deficiency in the correct element can lead to a condition known as scurvy, which was once a common problem in sailors on long voyages. Scurvy is characterized by fatigue, weakness, and bleeding gums, and can be prevented with adequate intake of the correct element.
**Correct Answer:** D. Zinc