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
Fordyce's spot involves – 
Select and explain. 
A. Sebaceous glands, B. Pilosebaceous glands, C. Hair, D. Nails
A: Sebaceous glands
Answer: A: Sebaceous glands 
Explanation: Diseases of sebaceous glands

Pilosebaceous glands          →       Acne vulgaris, Epidermoid (sebaceous) cyst.
Ectopic sebaceous glands    →   Fordyce's spot, Montgomery's tubercle