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: Anatomy
Mammary gland is a type of: 
Select and explain. 
A. Modified sweat gland, B. Ceruminous gland, C. Sebaceous gland, D. Holocrine gland
A: Modified sweat gland
Answer: A: Modified sweat gland 
Explanation: Mammary gland is a modified sweat of apocrine variety.