<prompt> A patient presented to the OPD with clinical features of pneumonia. Sputum examination of the patient revealed a gram positive cocci with alpha hemolysis on sheep agar. Which test will you do to confirm the diagnosis?Coagulase testBacitracin sensitivityCAMP testBile solubility  <response>: The clinical features and microbiological characteristics are suggestive of pneumococcal pneumonia The diagnosis can be confirmed by Bile solubility and Optochin sensitivity Reference: Ananthanarayan and Paniker;s Textbook of Microbiology Tenth edition 