Which of the following is used as an immunosuppressive agent in organ transplant patients?

Assertion $A$: Cyclosporin-$A$ is used in organ transplantation of patients.
Reason $R$: It reduces the cholesterol level in the blood.
Which option is correct for Assertion $A$ and Reason $R$?

Streptomycin is produced by which micro-organism?

Which microorganism is used to produce statins, which are used to lower blood cholesterol levels?

Which bacteria are used to produce a clot buster for removing clots from the blood vessels of patients who have undergone myocardial infarction?

Which microbe is used for the production of Swiss cheese?