This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Skin
Which of the glands are affected in Fox Fordyce disease? 
Select and explain. 
A. Sebaceous glands, B. Eccrine glands, C. Pilosebaceous units, D. Apocrine glands
D: Apocrine glands
Answer: D: Apocrine glands 
Explanation: Fox Fordyce disease is a disease of apocrine glands. It is an uncommon chronic disorder of sweat glands causing itchy lesions of the skin under the arms, in pubic area, around the nipple pas of genitalia and sometimes on chest and abdomen. It is characterized by by retention of apocrine sweat leading to the formation of yellow papules.