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: Medicine
Dental procedures for which antibiotic of choice for the prophylaxis of endocarditis in adults is (Note: Patient is allergic to penicillin and he is not able to take oral medicine): 
Select and explain. 
A. Clarithromycin 500mg 1 hr. before dental procedures, B. Cephalexin 2g 1 hour before dental procedures, C. Cefadroxil 2g 1 hour before dental procedures, D. Clindamycin 600 mg. 30 min. before dental procedures
D: Clindamycin 600 mg. 30 min. before dental procedures
Answer: D: Clindamycin 600 mg. 30 min. before dental procedures 
Explanation: None