This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
Plague epidemic in Surat in 1995 has occurred after a 'silence period' of 
Select and explain. 
A. 18 years, B. 23 years, C. 28 years, D. 30 years
C: 28 years
Answer: C: 28 years 
Explanation: The last case of plague in India was repoed in 1966 and after that there was a 'silence period' of 28 years till the reappearance of the disease in September 1994, when there was an outbreak of bubonic plague in Beed district of Maharashtra and pneumonic plague in Surat (Gujarat).