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: Surgery
Actinomycosis is sensitive to - 
Select and explain. 
A. Streptomycin, B. Nystatin, C. Pencillin, D. Iodox - uridine
C: Pencillin
Answer: C: Pencillin 
Explanation: • Actinomycosis is a granulomatous suppurative bacterial disease caused by Actinomyces.
• Usually results following tooth extraction, odontogenic infection, or facial trauma.
Clinical Features
• Oral-cervicofacial disease is the MC form, characterized by a painless "lumpy jaw."
• Pelvic actinomycosis is a rare but proven complication of use of intrauterine devices.
Diagnosis
• Accurate diagnosis depends on careful histologic analysis.
• Presence of sulfur granules within purulent specimen is pathognomonic.
Treatment
• Penicillin and sulfonamides are typically effective against these infections.