Which of the following is done to identify Streptococcus pneumoniae?

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Optochin is ethylhydrocupreine hydrochloride and is used to identify Streptococcus pneumoniae by placement of a disk impregnated with optochin on a pure culture of the suspected organism.A zone of inhibition greater than 14 mm indicates S.pneumoniae.The bile solubility test is performed with desoxycholate and is also used to identify S.pneumoniae.When the reagent is applied to colonies that are S.pneumoniae,after a period of 30 minutes the colonies will dissolve.Other b-hemolytic streptococci will not dissolve in the bile salt.

Which of the Following Is Done to Identify Streptococcus Pneumoniae