This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Microbiology
SARS is caused by novel variant of? 
Select and explain. 
A. Pox virus, B. Toga virus, C. Coronavirus, D. Lyssa virus
C: Coronavirus
Answer: C: Coronavirus 
Explanation: Severe acute respiratory syndrome is caused by coronavirus type. SARS C/F Severe lower respiratory tract infection; Characterized by muscle pain, headache, sore throat Fever followed by the onset of respiratory symptoms mainly cough, dyspnea and pneumonia. There are six coronaviruses that can infect humans: Alpha coronaviruses 229E and NL63 Beta coronaviruses OC43, HKU1, SARS-CoV and MERS-CoV