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
Which of the following virus has negative sens RNA? 
Select and explain. 
A. Rabies, B. Reovirus, C. Coronavirus, D. Calci
A: Rabies
Answer: A: Rabies 
Explanation: Ans. is 'a' i.e., Rabies Types of RNA viruses There are three types of RNA viruses :? 1. Positive sens --> Virus RNA can immediately be translated by host's ribosomes into protein. Positive RNA _ > Protein Translation 2. Negative sens ---> Virus RNA is not able to begin translation immediately. Negative strand RNA first transcribed into positive strand RNA by viral RNA dependent RNA polymerase. Negative RNA__________________ (+)ve RNA__________ > Proteins Viral RNA dependent Translation RNA polymerase 3. Retroviruses They have reverse transcriptase which causes transcription to occur in reverse fashion i.e. synthesis of DNA from RNA (normally in transcription, RNA is synthesized from DNA). This DNA is transcripted into RNA.