$A$ patient brought to a hospital with myocardial infarction is normally immediately given

Streptomycin is produced by which micro-organism?

Assertion $A$: $Ernest \text{ Chain}$ and $Howard \text{ Florey}$ improved the production of penicillin.
Reason $R$: Penicillin was obtained from the fungus $Penicillium \text{ notatum}$.
Which option is correct for Assertion $A$ and Reason $R$?

Which acid is produced by the bacterium $Clostridium$ $butyricum$?

Rennin used in the cheese industry is

Which organism is used for the preparation of alcohol?