This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal cord, its lesions and ANS, Subject name: Anatomy
Which of the following skin structure'sfunctionis likely to be impaired in case of skin burns caused due to house fire? 
Select and explain. 
A. General somatic efferent nerves, B. Parasympathetic general visceral efferent (GVE) nerves, C. Trophic hormone production, D. Exocrine gland secretion
D: Exocrine gland secretion
Answer: D: Exocrine gland secretion 
Explanation: Skin has sweat glands and sebaceous glands, which are exocrine glands. Skin produces vitamin D, but it not a trophic hormone, and skin does not produce vitamin A. In addition, skin contains no general somatic efferent (GSE) and parasympathetic general visceral efferent (GVE) nerve fibers.