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: Unknown
A young person is having comedones and papulo-pustular acne over face and trunk and back. How will you manage the patient? 
Select and explain. 
A. Topical retinoic acid, B. Oral doxycycline + topical retinoic acid, C. Topical clindamycin, D. Oral retinoic acid
B: Oral doxycycline + topical retinoic acid
Answer: B: Oral doxycycline + topical retinoic acid 
Explanation: (Refer: Fitzpatrick's Dermatology in General Medicine, 8th edition)
Algorithm of treating Acne