This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic histology, Subject name: Anatomy
[{'content': 'Mammary gland is modified? \nSelect and explain. \nA. Merocrine gland, B. Sebaceous gland, C. Apocrine sweat gland, D. Mucous gland', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Mammary gland is modified apocrine sweat gland.', 'role': 'assistant'}]