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
In sebaceous glands accumulation of sebum leads to – 
Select and explain. 
A. Millia, B. Acne, C. Epidermoid cyst, D. Milliria
B: Acne
Answer: B: Acne 
Explanation: Blockage of Pilosebaceous gland is the main pathogenic factor for Acne vulgaris.