Q:
      
      
         
            
Pfizer Inc is a pharmaceutical company of which country?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: D) USA         
         
Explanation: The Pfizer Inc of the United States of America (USA) and its partner BioNTech of Germany completed the phase 3 trial of their COVID-19 vaccine candidate, BNT162b2 against SARS-CoV-2 with 95% effective success rate.
       
      
      
      
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