Correct option is: (4) Removing clots from blood vessels
Streptokinase produced by the bacterium Streptococcus and modified by genetic engineering is used as a ‘clot buster’ for removing clots from blood vessels of patients who have undergone myocardial infarction leading to heart attack. Curd production is done by Lactobacillus and ethanol production is done by Saccharomyces.