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: Dental
Fox Fordyce's disease is a disease of – 
Select and explain. 
A. Eccrine glands, B. Apocrine glands, C. Sebaceous glands, D. Pilosebaceous glands
B: Apocrine glands
Answer: B: Apocrine glands 
Explanation: Diseases of Sweat glands

Eccrine glands         →         Hyperhydrosis, Anhydrosis, Miliaria.
Apocrine glands       →         Chromhidrosis (coloured sweat), Osmidrosis (offensive sweat odour), Bromhidrosis (hyperhidrosis + offensive odour), Fox - Fordyce's disease (apocrine miliaria), hidradenitis suppurativa.