Step 1: Understand statins.
Statins are secondary metabolites used to lower blood cholesterol levels by inhibiting cholesterol biosynthesis.
Step 2: Identify producing organism.
Monascus purpureus is a yeast-like fungus used in fermentation and statin production.
Step 3: Medical significance.
Statins are widely used in treating cardiovascular diseases by reducing LDL cholesterol.
Step 4: Analyze incorrect options.
Saccharomyces cerevisiae is used in baking and alcohol fermentation, Candida utilis is used in SCP production, and Trichoderma is a biocontrol fungus.
Step 5: Industrial application.
Monascus purpureus is industrially exploited for natural statin production.
Step 6: Conclusion.
Thus, the correct answer is Monascus purpureus.