This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Isolation not as a method of a control is infection in which of the following disease? 
Select and explain. 
A. Diphtheria, B. Plague, C. Mumps, D. Cholera
A: Diphtheria
Answer: A: Diphtheria 
Explanation: .isolation is defined as the seperation for the period of communicability of infected persons or animals from others in such places and under such conditions as to prevent or limit the direct or indirect transmission of the infectious agent from those infected to those who are susceptible or who may spread the agent to others.diseases include measles,chickenpox,cholera,diphtheria,shigelllosis,hepatitisA ,influenza ,mumps,peussis etc. ref:park&;s textbook,22nd edition,pg no 112