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: Microbiology
Susceptible cultured cells infected with which of the following viruses would exhibit hemadsorption with the appropriate erythocyte -a) Sindbis virusb) Rabies virusc) Measles virusd) Respiratory syncytial virus 
Select and explain. 
A. a, B. c, C. bc, D. ad
C: bc
Answer: C: bc 
Explanation: Hemadsorption  

When hemagglutinating viruses grow in cell cultures, their presence can be indicated by the addition of guinea pig erythrocyte to culture. If the viruses are multiplying in the culture, the erythrocytes will adsorb on to the surface of cells. This is known as Hemadsorption.
Viruses causing Hemagglutination are :

- Influenza Virus
- Measles
- Rubella
- Coxsackie Virus
- Rhino Virus
- Rabies
- Parainfluenza Virus
- Toga Virus
- EnteroVirus
- Echo Virus
- ReoVirus